Aquarium 4 Inch Air Stone, Fish Tank Airstone Bubble Diffuser for Air Pumps Buckets Fish Tanks Ponds DWC Reservoirs and Circulation

2”, 4” and 5” legit really good aerator stones. Produces tons of bubbles with a 12 volt pump. The 8” was a dud, a pos. Maybe I got a bad one? Large bubbles escaped on one side only.

I use this to keep my eels alive in between fishing trips. It works better than a small round stone. They swim through it and seems like they are happy.

I saw some reviews saying half the stone didn't work, but I hoped for the best and purchased this product anyways. Lo and behold, when I plugged my new air stone into my 4 watt air pump, only half the stone bubbled, but the bubbles were great bubbles. Credit where credit is due. Now looking into the matter, the instruction manual claims that if only half the air stone works, then the problem is with the air pump not being strong enough. I guess my aforementioned air pump with a power of 4 watts was simply not enough. The details of this product recommend use with an air pump of > 4 watts. > is not >= I guess, and I can't say I didn't see this happening because I was warned. So yeah, unless your air pump power is greater than 4 watts, the air stone won't bubble completely, and it's a lowkey weird look. The suction cups are great though, and really hold the stone in place.

I recently purchased the **Pawfly Aquarium 4 Inch Air Stone** and I'm thrilled with the results! Here’s why I’m giving it a five-star rating: **Effective Oxygenation:** This air stone does an amazing job of diffusing air into tiny bubbles, which significantly increases the oxygen levels in my tank. My fish are much more active and healthy since I started using it. **Easy to Install:** The setup was straightforward; I simply connected it to my air pump, and it was ready to go. It fits perfectly in my tank without taking up too much space. **Durable Material:** The quality of the air stone is excellent. It feels sturdy, and I appreciate that it doesn’t break easily like some other brands I've tried in the past. **Consistent Performance:** I’ve been using it for several weeks now, and it consistently performs well. The bubbles are fine and create a lovely aesthetic in the tank while also benefiting my aquatic friends. **Great Value:** For the price, this air stone offers fantastic performance and durability. I highly recommend it to anyone looking to improve their aquarium’s oxygenation and overall health. Overall, the **Pawfly Aquarium 4 Inch Air Stone** is a must-have for any fish tank enthusiast. It’s efficient, durable, and has made a noticeable difference in my aquarium’s environment!

I thought it would be too big for a 75 gallon once I saw it, but it wasn't. My fish, a tiger oscar, loves this air-stone. He spends a lot of time in it, probably because he likes the feel of it. The wave maker gives him all the air he needs, but this is more for his stimulation and fun. He actually seems like he guards it when I'm doing a water change. The suction cups make it so it can't move or make a racket against the glass, which is nice.

Has been in my tank for a couple years, AND there's hard water here, and it's been no issues. My koi chill in the bubbles, and I just let that thing hang there. It takes the bigger tubing size, and you need a one way valve so keep that in mind. I don't remember if it includes one, but I bought an air pump and they were in there, and life just changed man. It makes zero noise, tons of bubbles, and it's got great flow even for a 50 gallon tank.

I like the weight of the 5" air stone discs by Pawfly, & by the look of them, they seemed to be of good quality. I've used Pawfly products before & so I was excited about using the two I purchased, in my aquariums, and achieving that particular look a round disc produces. However, I am very disappointed with them & Pawfly. 1. They soaked in a bucket of water for almost a month before installing, well over the minimum time one needs to soak an air stone before use. 2. They're positioned level on the aquariums floor, thus providing equal air supply to entire surface by having equal height across entire unit. 3. They're both in aquariums w no substrate, so clogging can't be the issue. 4. Each has their own pump, & not shared w any other device. All air flow is directly to the individual stone. 5. The air pumps are adjustable, but low or high strength make no difference w having the entire surface of discs produce bubbles. 6. No cracks or damage can visibly be seen to either disc. Immediately upon installing air discs & still after approx 2 wks in operation, one disc only produces bubbles across half of the disc. With the other disc only producing bubbles across a 3/4 section of the disc. Not very attractive in an aquarium when a round air stone disc doesn't produce bubbles across its entire surface area, not to mention I bought this air stone style to achieve its particular look/appearance...it was supposed to have. No, I can't recommend these. I expected much better results from Pawfly.

EDIT 1/21/2021 I was sorry to find the stone failed on me after using it once a month or two on average. Maybe others know if this seems like a reasonable lifetime for an air stone, but it seems like I haven't used it all that much. Just so you know, I used it for compost tea (really organic nutrients and earthworm castings, mostly, but a half-quart of compost too). I've cleaned it mostly with jet on hose nozzle after each use. Scrubbed it with bleach solution and wire brush about 3-4 times. So failure could be my own dang fault, I don't know. Seems ok, except the bubbles are a bit larger than I'd hoped. Mainly, I wish they had fitted it with a 90-degree outlet like some similar models. I used their measurements to conclude it would fit at the bottom of a standard 5-gallon bucket (for compost tea). Unfortunately, unless I cut off one of the legs it will not sit flat without badly kinking the tubing. Next time I'll purchase a disk with a 90-degree connection, which would allow more universal applications.

The seller gave me a low-quality Chinese substitute

Llevo una semana usándolo y todo bien hasta ahora.