Some tropical fish prefer warm Waters and high temperatures.
There are other fish that prefer much colder temperatures to survive.
When the water chiller in my fish tank stopped working, I went online to find a new one. For less than $200, I found a water chiller for the tank. The water cooled chiller is perfect for freshwater, seawater, or even a gas tank. The water chiller is made from ABS material that will not rust. There is a temperature display screen on the front of the water chiller. I ordered the chiller online and the item was shipped to me in less than 5 days. I received for the water chiller, a submersible pump, the power supply, and a hose. All of the parts necessary to install the water chiller were inside of the box along with easy to read instructions. It took an hour to install the new watercolor, but it works great. The fish have more energy and they no longer look lethargic and listless. I have been thinking about adding another fish tank to my home. I would really like to have a tank with box jellyfish. Box jellyfish are one of the most dangerous creatures in the sea and the smallest sting can paralyze and kill an adult human. I think that box jellyfish are extremely interesting and that is one of the reasons why I think they would make a great addition to my home aquarium. Unfortunately, they are highly expensive and very dangerous. You need a special license just to obtain the sea animal.