2-Fan

We just got our axolotl over the winter so keeping it at a safe temperature for him hadn't been a problem. Over the last week or so here in Oklahoma, temperatures soared into the 100's and our axolotl is kept upstairs, so when the temperature of the water in his tank started creeping into the 70's I started doing my research. I found this and after reading all of the helpful reviews, especially for axolotls I didn't hesitate to try it, considering the price of a tank cooler was not something I wanted to have to purchase, but certainly would have if this didn't work. He's a part of the family. I'm so glad I made this purchase. It is literally a life saver considering my research informed the that the ideal temperature for them is between 60°-64° and anything above 70° becomes problematic, even deadly. I received the tank yesterday after work, about 4:00 and the temperature on the tank was approaching 72° (first picture). I immediately took it out of the box, plugged it in, and like other reviews stated, it didn't fit over the top of the tank, but for now it's being held up by the glass lid I had over the tank (second picture), works fine, but I will try velcroing it, like another review stated they did so that my son (he's not a child, he's 16) doesn't accidently knock it into the water when feeding him. By 6:00, in the heat of the day and when the upstairs A/C is only able to cool the upstairs to 75° and with the fans on high, the tank had already cooled down to 68° (3rd picture)!! 4° in just two hours! I was very happy and so was he. He went right up to the fans and stayed there for a bit, almost like a human cooling themselves in a fan. I think he liked the current it gave off, but it was cute. The fans on high are a little loud, I mean, it sounds about like a little desk fan you would have on high. I checked again on his temperature when I woke up this morning and it had cooled his tank below 66°! That's as low as my thermometer reads so if it's lower than 66° or higher than 84° the thermometer strip is just solid black, so given that it was below 66° I felt like it would be okay to turn the fans to low. After coming home from work today, again in the heat of the day, with the fans on low he's setting at a cool 66° (4th picture). Couldn't be happier with my purchase!

I bought the single fan version of this for a 10 gallon tank with two small goldfish. They do fine in temperatures up to about 75 degrees but get grumpy and agitated at anything warmer, so I've been running this on hot days this summer. It cools the tank down quickly on the lower setting even when it's 80+ degrees in the house and is so effective that I need to leave the heater in to stop the temperature from getting too low. The rim of my tank is a little too thick for the fan to clip onto (the plastic isn't particularly flexible so there's not a lot of wiggle room in the thickness they say this will work with), but it rests easily on the rim in a corner propping the hood open an inch or two. With this setup, I lose almost an inch of water to evaporation on a hot day. The fan has two speeds but the lower one is more than adequate to keep my tank cool. I wish that instead of the higher speed, there was an even lower one that I could run at night - my only real complaint is the noise level, which isn't outrageous for a fan this effective, but the tank is in my bedroom and this is WAY too loud to sleep through. Overall it's a great little fan for the price and I'd buy it again.

The first one I got was defective but it was switched out pretty quick so that was a plus. All in all it’s a great fan and it cools my 125 gallon aquarium pretty rapidly. I bought the 4 fan version and it’s definitely the right call. It’ll the fan is on a temperature controller so it kicks on at 79• and cools until 78. It takes about a half an hour or less to cool the tank so that’s very efficient. Their are two drawbacks but neither are that big. 1). The screw it cons with to adhere to the tank only works for rimless or small rim applications. I just used industrial strength Velcro from my local hardware store and it solved that problem. 2) The fan is a bit noisy when it kicks on. My tank is in my living room and when the fan kicks on it’s definitely audible. Not a terribly loud noise but enough to notice. Long story short use Velcro and deal with the noise and get a really cost effective way to cool your aquarium.

I bought this item around the end of February and Less than 6 months later some of the fan don't work anymore. I installed it over the rim of my sump that way it wasn't showing. Much larger than I thought it would be but that should provide more cooling. Or so I thought. Pros: Easy to install provided that your tank in rimless and the glass or acrylic is not too thick. Has hi/low switch that can be toggled. Cons: The fans they used to keep the cost down are terrible. They were by far the loudest thing in my system when they are set to full power. That are made to be used around the tank, but there is nothing done to help protect them from the water. 3 of my 4 four fan I noticed had shorted out and the connection on the fan. Where the wire comes in and meets the circuit board for the fan. The are signs of electrical burn on the fan and the wire. I decided to replace with much better fans than can more air easier while still being quieter. Honestly they do say you get what you pay for. I'm not saying it is a horrible product and you shouldn't buy. I just want you to be aware of what happened to me as a fellow consumer. You should get a much better made product from a different batch.

Works awesome! My Axolotl aquarium sat around 71/72 mid day and 68 at night. Worried about the temps getting higher I ordered the 3 fan for my 10 gallon tank and it dropped my temps down to 64 degrees when fully adjusted up! My apartment is currently 75 degrees and the fans do well keeping the water cool. Knowing that, I can comfortably use this when I upgrade to a 20 gallon. Also the fan DOES fit around the black ledge around your aquarium. As for noise, it’s really not that bad for it being 3 fans and it doesn’t cause any extra vibrations on the tank but does add a little extra water current. My Axolotl doesn’t seem bothered one bit by it though.

I have a 10G freshwater tank which is always subject to overheating due to small volume and lighting. I bought the 2-fan option: has two speeds, first speed is less noisy and i think it will be enough for my setup if I leave it on during warm hours. Noise is not so bad in this option, like a laptop fan. Second speed is kind of like a turbo mode, it is quite powerful but also noisier, suitable for quickly lowering the temperature by a degree or two but I wouldn't leave it on that way because of the noise.

Agréablement surpris de la puissance de ces petits ventilateurs. Je dois garder mon eau froide pour mes axolotls et je ne possède pas de sous-sol alors très difficile de garder l'eau froide. Je possède une aquarium 35 gallons et les ventilateurs en position minimum abaisse la température de l'eau de 3 degrés!! J'imagine qu'au maximum j'atteindrais les 4 degrés. Légèrement bruyant (surtout au maximum) mais un mal nécessaire pour ceux dans une situation comme la mienne cela en vaut tellement la peine. Reste à voir la durabilité mais très satisfait jusqu'à maintenant.

little tight on the rim of the tank but cools the water fast

Little noise & chinese product, not from usa.

I am using this on a 20 Gallon Saltwater tank. There are two settings for the fan for speed. It is fairly quiet on the first setting and audible on the second due to the wind rushing through the fan. Side note, if you have a tank lid you may not be able to use the provided securing screw. Overall its a great product for those hot days where you need to keep the temperature of your tank down.