

🧂 Elevate your freshwater aquarium health — because your fish deserve the best!
API Aquarium Salt is a premium 36-ounce box of natural evaporated sea salt formulated to supply essential electrolytes that improve fish respiration, reduce stress, and promote healing in freshwater aquariums. Ideal for new setups, water changes, and disease recovery, it dissolves quickly without clouding water and is safe for most plants. Trusted by aquarists for over 50 years, it’s the go-to solution for maintaining vibrant, healthy fish and crystal-clear tanks.













| ASIN | B0010P82UO |
| ASIN | B0010P82UO |
| Best Sellers Rank | #1,785 in Pet Supplies ( See Top 100 in Pet Supplies ) #1 in Fish Medication & Health Supplies |
| Brand Name | API |
| Care Instructions | Disposable |
| Color | color: multi natural |
| Country of Origin | United States |
| Customer Reviews | 4.7 4.7 out of 5 stars (23,438) |
| Date First Available | June 15, 2004 |
| Date First Available | June 15, 2004 |
| Department | Unisex-Adult |
| Department | Unisex-Adult |
| Directions | Use API Aquarium Salt when setting up a freshwater aquarium or fish bowl, when changing water, or when treating fish disease. Add 1 rounded tablespoon for every 5 U.S. gallons (20 L), or ½ rounded teaspoon for every U.S. gallon (4 L) of aquarium water. Note: Aquarium salt does not evaporate and is not filtered out, so it should only be added with each water change. Care should be taken when using … |
| Is Discontinued By Manufacturer | No |
| Item Dimensions LxWxH | 2.75 x 2.75 x 9 inches |
| Item Package Dimensions L x W x H | 9.01 x 2.91 x 2.87 inches |
| Item Weight | 2.2 Pounds |
| Item model number | 106B |
| Item model number | 106B |
| Manufacturer | Mars Fishcare |
| Manufacturer | Mars Fishcare |
| Material | See description |
| Model Name | AQUARIUM SALT-QT (33 OZ) |
| Number of Items | 1 |
| Product Dimensions | 2.75 x 2.75 x 9 inches; 2.2 Pounds |
| Size | 36 oz |
| Style | Aquarium Treatment |
| Target Audience Keyword | algae-eaters, betta-fish, bottom-feeder-fish, cichlid-fish, fish, goldfish, invertebrate-fish, mollusks, octopuses, rays, sharks, snails |
K**R
Works amazing great price
Works amazing helped my tank and my black moor goldfish had red irritation in his eye. It cleared up instantly after I put it in. My water is crystal clear.
T**O
Essential for Freshwater Aquariums – Must-Have for Healthy Fish!
I’ve been using the API Aquarium Salt for my freshwater aquarium for quite some time now, and I’m thoroughly impressed with the results. Here’s why I’m giving this product a full 5-star review: 1. Promotes Fish Health: This aquarium salt is great for promoting the overall health of my fish. I’ve noticed an improvement in the vitality and color of my fish, especially when used during water changes or to help treat minor illnesses. The salt provides essential electrolytes that help maintain osmotic balance and promote a healthy immune system for the fish. 2. Works as a Healing Aid: I’ve used this salt to treat minor ailments in my fish, such as stress or injuries. It’s been especially effective in helping fish recover from small cuts or scrapes. I follow the instructions, and it seems to work wonders in speeding up recovery and reducing stress levels in my tank. It’s also helpful when acclimating new fish to the tank environment. 3. Perfect for Freshwater Aquariums: I’ve used other salt products in the past, but this one stands out for its quality and effectiveness specifically for freshwater aquariums. It dissolves easily and doesn’t cloud the water, which is a huge plus. The water quality remains stable, and the salt doesn’t cause any harm to my plants, which is important since I have a planted tank. 4. Safe and Easy to Use: This product is easy to measure and dose according to the size of my aquarium. I appreciate the clear instructions on the box, which helps me ensure I’m using the right amount. I also like that it doesn’t affect the pH of the water in a harmful way. I’ve had no issues with the salt causing unwanted spikes in my tank's water parameters. 5. Great Value for the Price: The 67-ounce box is a great value for the price. It lasts a long time, as you only need to use a small amount for each water change or treatment. Given the quality of the product and how much it improves the health of my fish, this is definitely worth the investment. 6. Packaging May Vary, But the Quality Remains the Same: Although the packaging may vary from time to time, the quality of the salt remains consistent. I’ve used this product several times, and every time, it’s been effective and high quality. Final Thoughts: The API Aquarium Salt is a must-have for any freshwater aquarium enthusiast. Whether you’re looking to improve the health of your fish, treat minor injuries, or simply maintain a stable environment, this salt does it all. I highly recommend it to anyone with a freshwater aquarium! 💯 Highly recommended – a great addition to your aquarium care routine for healthy fish!
N**K
API is a good brand.
Qualities seems to be good. It seems to be effective. No bad or odd smells. The only issue I had was the cardboard container that the salt is in was slightly opened in the corner upper edge + just looked like the glue didn't seal properly at manufacturer, there was some salt spilled in the shipping box, but I was able to save it.
L**Y
A must need for fish health
This is a very good product. It is very good for your fishes health
A**.
Used to help Betta fin rot, minor complaints (Betta fin rot information included if you need help!)
I purchased this API aquarium salt for it's healing properties in my freshwater Betta tank. He was coming down with a tiny section of fin rot because of poor water quality for a short period of time. This, along with very frequent 25%-50% water changes helped heal his fin rot. (The water changes alone may have worked fine, but I wanted to add salt for extra help in regrowth.) I really only have 2 complaints: 1- The granules vary, but some are quite large. Even by adding them to a small cup of boiling water and stirring frequently it took several minutes to properly dissolve. If not dissolved properly and added gradually it can burn your fish! 2- The directions are not very clear. They are listed in 3 languages, so that's nice, but there is plenty of room for more clarity on dosing your tank. (The product label is on 2 of the 4 sides so they could actually use another side for information to add clarity.) It states that you can either add 1 rounded tablespoon for every 5 gallons OR 1/2 rounded teaspoon for every gallon. The fist measurement gives you a 1 tbsp to 5 gallon ratio while the second measurement give you a 0.83 tbsp to 5 gallon ratio. I guess it's trying to be helpful for those with a tiny bowl or small hospital tank??? It mentions NOTHING about dissolving the salt first or adding it gradually. If you are treating your fish and don't happen to learn that in your own research, then you may end up just plopping the measurement into your tank and harming your fish. ***I do appreciate that it mentions that some live plants may not tolerate the salt. I chose to risk it and many did ok. They didn't grow much, but didn't seem harmed. A few did lose leaves and kinda melt away though. I simply removed those that were not tolerating the salt for the time being. ***I also appreciated the packaging mentioning that the salt does not evaporate so be careful not to compound it. For example, when I did a 25% water change, I dissolved and added 25% of the salt I had previously dosed my tank with to the new dechlorinated water. Compared to other retailers the price is good considering the volume you get. Plus the convenience of not going to a store is nice. NOTE ON TREATING BETTA FIN ROT: (Just thought I'd add this in hope that it might be helpful for someone.) Fin rot is common, so don't feel horrible if you are dealing with it. Doing lots of research before any treatment is very important! Anyone can type anything on the internet that information will pop up in a google search. Read lots of different opinions, watch many reputable/informative videos and do your best to understand why your Betta has fin rot in the first place. If you don't have a heater or filter this is the first change your should make when combatting fin rot. All Bettas (even healthy ones) with benefit from these tank additions. (If your house temperature NEVER falls below 78F you may not need need a heater, but most of us do for at least part of the year. It can easily be unplugged or removed when not needed.) Bettas don't like a strong current so a sponge filter works great. If you have a filter that is built into your aquarium or came with a set, there probably an easy way to baffle it for your Betta's comfort. I added an aquarium sponge to the output of mine. Your could be biting it's own fin which looks like bites taken out opposed to a fraying or melting of the fins. This often happens on the caudal (think tail) fins pretty much in line with where your Betta's mouth could reach. You may even observe your Betta seemingly "chase its tail." My research tells me this often happens when a Betta is unhappy so consider if your tank is large enough. Betta's enjoy stimulation so a Betta leaf, hide and silk plants are an easy addition to try if you don't already have them. The fin damage could be caused by sharp objects in the tank. This may look like a tattered or ripped fin. Betta fins are very delicate. It's good to check all decorations thoroughly by rubbing your fingers over them. You can possibly alter them to make them safe (like sanding down a rough area of driftwood) but be sure that only soft items are in your tank. Even some plastic plants may be damaging your Betta's fins so many people recommend silk or live plants only. Unclean water may have caused your fin rot. Even if it looks clear to you, it may be full of harmful ammonia, nitrites or nitrates. If you don't have a test kit, investing in one will help keep your Betta healthy. The API master test kit provides LOTS of tests and is very accurate. For me, I learned that I was not cleaning my tank the best that I could. I house 1 male Betta and 2 Nerite snails in a 5 gallon planted tank. Nerite snails help with algae, but they also poop a lot, so there was lots of animal waste my tank. Because I have a planted tank and was trying to allow some plants to carpet the bottom, I did not agitate my substrate enough when cleaning. I was also not consistent with my weekly water changes when work got busy. Big mistakes that led to a little fin rot. Along with 25% weekly water changes to reduce waste it is important to gravel vac the detritus up from your tank so that bad bacteria does not grow in your substrate. Use your siphon to press down into the substrate. Once you see lots of substrate getting pulled up (along with the detritus) lift the siphon a few inches out of the substate and give it a wiggle. This should release the substrate but allow the detritus to continue up the tubing. (If substate gets caught and slows down suction it can easily be removed by taking out your siphon and piking it with a clean wooded skewer.) If you are working around plants, do this method to the exposed substrate only. Wiggle the vac or use a clean/unused wooden chopstick or skewer to agitate around the substate of your plant. This will make the detritus start to float into the water and you can suck it up there. I also find it helpful to take a new toothbrush that I have designated for tank cleaning to the leaves of my plants. I noticed some brown algae (diatom) buildup forming on them. I initially thought they may be dying, but the brown layer came off easily and once removed it helped them grow better. On smaller leaves I just gently rubbed it off with my fingers. I use the same brush to scrub off my driftwood. You can use it on the inside glass of your aquarium too if you have a large buildup of algae, but if not then you don't need to. I have moss glued to my driftwood so I use my hands to agitate that and sometimes pull or trim off excess or weakened growth. This helps encourage new growth. I plop any removed moss into an open mason jar full of dechlorinated water and set it on the window sill to grow more fresh green algae over a month or so. Sometimes I replace that water and sometimes I top it off with a splash of old aquarium water for some plant nutrients. It is also important to note that if you have any uneaten food (pellets that fall or messy bits from a frozen food feeding) you should pull out your siphon and remove them within a few minutes. They will pollute your tank and cause problems for your fish (and you). Sometimes you have to learn the hard way, but cleaning your tank is often more involved than just scooping out some water once in a while! Good luck with your fin rot and don't forget to do your research!
S**Z
Box will get wet, dissolves after a while
Works really well, will buy again but one thing I would’ve known and acted on sooner is this is salt so it does have moisture the carton it comes in will get wet and get soggy but after I switched it into a ziploc and double bagged I haven’t had any issues at all. It says it doesn’t dissolve but I’ve noticed it’s gone after a while in my tank maybe a couple of hours so that’s nice.
H**N
Must-have for Fishkeepers
A must have for any fish keeper. There’s a reason API is known for quality.
M**S
Its salt
What can I say...It's salt. It was a good price and arrived quickly.
N**8
منتج مفيد
R**N
So far, I think the best purchase I have made in regards to my Betta beauty. I have struggled with fin rot with my Bettas due to them biting their own tails and the introduction of fish likely causing bacteria to set in. I tried everything, I made sure my cleaning regime was perfect, had good heat, feeding and changed decorations to prevent boredom but it didn't help. My first boy got tail rot and I treated it with melafix as was recommended by the petshop worker, it worked for my mum but my boy died. My second boy is truly a unique beauty who came with a ripped tail. Slowly, this turned to mild finrot that resulted in dissolving, drooping fins and black discolouration as is common. I tried this salt with the recommended doses and after 1 day my boy has his tail fanned out all the time. He is looking happier already! My advice: dissolve salt in a cup with aquarium water before introducing it to the actual aquarium water with fish in it. It will burn them otherwise! -be sure to do 100% water changes once a day if you are treating them for a disease like finrot by dosing the water with salt. Do not exceed using the salt for more than 10 days in a row as treatment, it will start to harm the fish. Compounding the salt will only do harm, water changes are a must ! Again, I highly recommend this product!!! I will update as his treatment continues with aquarium salt. And shipping was so fast! The photo shows him, albietly blurry, all fanned up after one day of treatment with the API Aquarium Salt. His tail has lost half of its length to finrot but he is looking happy again.
V**0
Voilà un super produit qui est un médicament et qui doit être utilisé intelligemment et avec précaution ! Vous ne prenez pas un doliprane quand vous avez une artère ouverte (enfin j'espère) Je ne sais pas pourquoi ce produit n'est pas plus utilisé ou plus recommandé en France pour moi c'est un must have pour toutes les personnes ayant des poissons Si votre poisson est malade renseigner vous bien et agissez rapidement. C'est pourquoi je vous recommande d'acheter ce produit en prévention les poissons tombant malade souvent un samedi soir quand tout est fermé ! Il est quasiment impossible d'avoir tout les antibio plus cibler nageoire infecter point blanc etc ici on a un bon compromis qui peut aider/temporiser en attendant de pouvoir acheter le médicament spécifique nécessaire Je pense qu'il faut toujours utiliser ce produit en bac hôpital ainsi que la plupart des antibio sinon vous aller flinguer la faune et la flore bénéfique à votre aquarium et au final peut être faire plus de mal que de bien Renseigner vous et agissez intelligemment Ce produit vos ces 5 étoiles sans problemes Désolé si il n'a pas sauver votre poissons au si vous l'avez mal utiliser Dernier petit conseil lors de l'utilisation des antibio ou bac hôpital attention au surdosage vraiment vraiment je pense que sous doser c'est mieux Et si le pire arrive ne vous en voulez pas trop continuer d'apprendre et de vous faire plaisir avec l'aquario c'est un hobbi vraiment plus difficile qu'on vous le fait croire et frustrant souvent mais magnifique et plein de bon moment Un entretien soutenus de laquarium et l'observatin de vos poissons ainsi que les recherches sont primordial pour la survie de vos protéger Bonne journée a tous
M**A
Helped my betta calm down , would 100% recommend if your fish has fin Rott
E**.
I use this on my fresh water aquarium. Highly Recommended 👍🏼👍🏼
Trustpilot
2 months ago
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