OASE Indoor Aquatics CrystalSkim 350 Skimmer

This surface skimmer works awesome on my 40 gallon saltwater tank. It’s quiet, doesn’t leak and fits perfectly on the tank. It’s very durable and easy to clean. Gets the job done and keeps my tank looking great! Also a great price

I purchased this for my red eared slider's tank due to his skin shedding and without this skimmer, I would had to manually net out all the white flaky skin & oily protein skim on the surface of the water. This works great in keeping the tank clear and clean. Once I notice particles floating in top (approx. 4 days), I would clean out the coarse app for filter and it would work beautifully again. Never knew this product was available until I got tired of skimming the tank with the net and decided to see if such product is available and glad there is!

I bought this one due to low price and that it had a long cord. (First brand i bought, I found the cord was way too short to even plug in while inside the tank). Was very noisy at first and blowing air bubbles until I figured out how to get it at the right level so the skimmer intake floats on the surface and can go down as the water evaporates. Very quiet after that and no bubbles. Works well and cleared all the surface scum off in about 20 minutes from our 65 gal turtle tank. I set it on the light timer switch so it only runs about 10 hours a day. I will buy a second for our other tank since it works so well.

Skimmer works well, noise level remains almost unnoticeable, no assembly required, value for money great, product arrive in good working order, and the item remains very compact and takes up very little space.

The media could not be loaded. I got the Crystalskim 350 to help with the surface build up I was experiencing in my 75 gal aquarium. As others have stated, it’s not the easiest thing to set up. It is way too powerful. Even on the lowest speed setting and having the filter as far down in the water as it could go, I still was experiencing micro-bubbles. To solve this, I replaced the provided extremely coarse filter pad with a more fine pad that i cut to size. That solved the issue. Although, i expect this is going to lead to more frequent maintenance. My other complaint is the unit i received is grey, not black. Which is unfortunate because my background is black and i was hoping this would blend in. It doesn’t. Construction seems solid, it is quiet, and it made a visible difference in about 30 min. This is my first Oase product, so only time will tell. So far, it does what it’s supposed to. But since i had to modify a $35 surface skimmer, and i received the wrong color, i’m rating the Oase Crystalskim 350…3 stars.*Edit*The micro-bubbles came back. The only solution I can find is lowering the flow rate all the way down. Which reduced the filter’s effectiveness significantly. The filter is not capable of keeping the surface clean on its lowest setting. So its either a semi-clean surface, or microbubbles. I’m knocking this piece of junk down to 1 star. This is what i get for not getting a Fluval. If the Fluval sk400 was easier to find in America, I would have never went with this hunk of crap in the first place. Avoid this purchase.

This is a really good surface skimmer. If you're looking for something to pick up leaves from a planted tank, or to catch the duckweed in your tank, excess food, etc. this isn't the unit. But if you have a tank of Mbuna or other aggressive eaters and there is a constant oily film on the top water in your tank, this will remove it. I have it in a 75 gallon planted tank with about 30 Mbuna and it works great. Be sure to unplug it when feeding and to remove any plant debris from it daily with the provided plastic tweezers.

This is for no flow freshwater tanks. If you have output flow and wave pump this thing is just garbage. It has to have a level surface to work. It will lots of blow micro bubbles until you find the sweet spot which you have a millimeter to play with . As soon as your water level changes or evaporates later on that day, back to purging and bubbling out the aquarium. The floating top won’t rotate without the flow cut off. You need a hang on back filter with no flow pumps for this to work. Reefers, spend your money elsewhere.

Had it for a little over a month. Worked very well. Then decided to stop working all together for no reason at all. Going to contact Oase warranty. Probably best to avoid this product.Edit: would like to say that after contacting customer support, they insisted that the impeller be cleaned. You pull off the bottom of the skimmer and it comes free. Mine was barely dirty. Maybe the magnet got off track or had just enough dirt to impede it. Because of this design, it should be cleaned with regular water change maintenance