How do I cool a tank?

[William]

I know how to heat a tank, but not how to cool it.

The reason I post this is because theres been a temputure spike and the air around my tank, as well as the water in my tank is around 84F+ degrees right now and I'm afraid about my fish not being able to take the heat.



and sorry to the site admin if I post to many threads

[justDIY]

84 is fine for occasional expsoure for most any tropical fish.

for cooling, the cheapest and easiest way is to put a fan blowing on your water. this works real well if you have A/C, but still works even if you don't

you can also look into things like chillers, but they cost a lot to buy and even more to run.

you can use ice or icepacks as well, although that method is not terribly effective due to the physics of water.

[William]

I have an airconditioner, if it wasn't for A/C the temp would be higher.. and I have a fan blowing on the tank :-\

[justDIY]

hrmm ... is the fan blowing on the water, so you see ripples, or just on the tank in general?

the air has to be moving the water in order to cool it... try a bigger fan!

I know the method works, I've used it to get a 4 degree drop in my tank on really hot days

[William]

I can't blow it directly on the water, no..

Because of tank position, as well as jumping fish [ I.E. Bala Shark ] and the escape artest [ I.E. Hammer, the fiddler crab. Whose so good he even ESCAPED HIS OWN SHELL! j/[acronym:43b5df69b1="Kelvin or Potassium, depending on context"]k[/acronym:43b5df69b1]:P ]

[justDIY]

[acronym:e08a7c05bb="Laughing out loud"]LOL[/acronym:e08a7c05bb] about the crab and good work for making it grow

invest in a sheet of egg-crate to cover your tank ... the holes are about 1 square inch (1/2 by 1/2)

this will keep critters in and still let you move some air.

I've heard sitting your canister filter in a bucket of ice also works - if you have a canister you could try that.

[William]

I use a Top Fin 40Gal [acronym:abe42d549a="Hang On Back"]HOB[/acronym:abe42d549a] filter

I believe it has a pump capacity of anywhere between 180 and 200GPH, and it runs at about...73%-78% flow.

[tkos]

Your tank isn't anywhere near a window is it. Direct light can really heat things up.

[madasafish]

I've had this problem a lot recently. And (depending on your fish) 84 is often really too hot... Check out their preferred temps on www.liveaquaria.com, or www.fishbase.org.

Your other option is to buy one of the reptile lids--the wire mesh. With that on your tank, you can still blow the fan and cool the water. Best bet if you're having trouble positioning it: get out a step ladder and tie the fan to the top of it. I've done this, and it works well--I was able to cool the tank to 78 degrees from 82-84.

Beware... this will increase the rate of evaporation on your tank by 10 or 100 fold. You'll have to do frequent top ups, but your fish will really appreciate it!

Best of luck!

[tkos]

One thing to mention as well is that ammonia will be more toxic at high heat levels and oxygen levels will be lower. So if you are unable to get the heat down make sure to test for ammonia and do frequent water changes.