NTRA Aquarium Cooling Fan Adjustable Fish Tank Supplies 2 3 4 Heads Quiet Cold Wind Durable Mini Temperature Control Clip-On Chiller Energy Saving Fresh Marine (FS 602) Review

I liked that the fan was movable and could be tilted towards the aquarium. But the performance was terrible, it didn't cool my tank at all. It might be ok for a small tank but definitely not for 40 gallons.

I wish the jets were a bit wider so I could fit them to my black rimmed tank. I did however attach it to my tank light and it works great and is very quiet. I have a dual fan model and it's quite compact which I like. Maintains water temperature more than 10 degrees below room temperature without causing excessive evaporation!

I have three heads and I thought two heads might not have enough power. It practically does not shoot in the air. It didn't cool my tank at all. The looks and size seemed nice, but it's very weak and doesn't cool at all. I think I can cool my aquarium better by blowing on the water. I need a 6+ head model to even see the result. I only have 40 liters. Very disappointed. Maybe for 5 gallons that would be fine.

It's very hot in my area and I was desperate for a way to cool my 30G axolotl tank. I put this fan on my tank hoping to see decent results but as the title says it actually made absolutely no difference. It didn't lower the temperature even by 0.01 degrees. It's like there isn't even a fan. The fan might be more efficient at lower temperatures, but it's utterly useless in hot weather when you need it most.

This is a nice compact little fan that produces quite a bit of air. It's quiet, as performance isn't impressive, but it's a nice "breeze" that should keep things that require airflow cool. My only issue is that there was some debris in my particular fan and you could hear the rumble inside the case. Six small screws and the whole fan falls apart and after a few shakes it's ready to use. It works, so it's not known where the debris came from. For the money it will work but I don't expect it to…