How to keep a 70 gallon fish tank cool with out a chiller?

Answer 1

Since the water from your tank will be evaporating the hotter it gets, you can just add some cooler (not ice cold) water to the tank to gradually bring the temperature to its desired state.

Regardless of tank size, the most important thing you need to do is gradually lower the temperature of your tank.

Adding ice to the tank may seem like the easiest solution, but it could shock some of your fish.

Now... if you want to get industrious and have some time on your hands, why not build your own chiller? You'll need a pump, some tubing, ice, water, salt, and a bucket.

1. Make a coil out of the tubing and insert the coil into the bucket. Leave enough tubing on either side of the coil to reach the aquarium.
2. Attach the pump to one end of the tubing and place into the aquarium.
3. Place other end of tubing on opposite side of aquarium.
4. Fill bucket 1/4 full of ice, 1/2 full of water, and add 3 tablespoons of salt.
5. Turn on the pump.

The salt water inside the bucket will have a low freeze point and stay colder longer.

The coil you inserted into the bucket acts as a heat exchanger (like an Air Conditioner). As warm water moves through the coil, heat is transfered to the bucket and cooler water comes out the other end.

You should experiment with different coil sizes and amounts of ice water to get to the desired effect.

When the tank reaches the temperature you need, shut off the pump.

Answer 2

Throw some ice in it. Just make sure there's enough room for the water on top once it melts and add chemicals accordingly to accomodate the extra water. I haven't tried it but the fish should leave the ice alone because they like to be in warmer temperatures assuming this is a freshwater tank. = )

I have not tried this so my best answer would be to consult a reliable fish specialist. There is a great one is San Diego called Fountain's [phone], they've always been more than happy to answer any questions I have when I call. Good luck.

Answer 3

Put a fan where it can blow across the water surface. Evaporation will cool it a bit, though not as much as a chiller. But WAY cheaper. And, of course, have as little cover on the tank as necessary, and keep lights to a minimum.

Answer 4

freeze containers of water, make sure the containers are clean before putting them into the fishtank. This way you do not dillute/pollute the tank. Also wrap part of the tank in a blanket to keep the heat out. Place the tank away from an outside wall if possible.

Answer 5

I think it's probably best to put the ice in a ziplock bag (get all the air out that you can) then put some stones in it and let it sink to the bottom. Just ice cubes floating around on the surface reduces the amount of oxygen that can be transferred into the water.

Answer 6

Ice cubes

Answer 7

Add ice

Answer 8

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