Which fish you have?

Currently we have about 50 big Japanese Kois, some small tin foil barbs, some black mollies, 13 bala sharks about 2 fighting fish and some other fish ...oh right we have some cichlids too but they are aggressive ones so we had to separate a few of them. Not to long ago I had over 500 fishes to take care of. The included blue dolphins, speckled mollies, flamingo guppies, albino and black tiger oscars, a flowerhorn and lots and lots of Siamese fighting fish. Bet I forgot a few of them too... When I got a job I didn't have time for them all so i sold most of them and kept the ones that are easier to maintain. I got to admit, very rarely a fish would die on me but when one did, it felt so sad! It's hard to watch a fish grow up and then have to see it go. But that is their life cycle too, nothing we can do sometimes.

There are cold water fish and then there are those that need warmth to be comfortable and stress free, they should not be in the same tank as too warm or too cold a temp will stress the fish and lower their resistance to diseases. And then you need to have tanks that are large enough for the fish, just because the fish are not bumping into each other does not mean that there is enough room in the tank. some small fish such as the neon tetras need lots of swimming room so that should be best kept in a tank of at least 20 gallons or more in "schools" of 6 or more to make them feel comfortable. Also in small tanks , they get polluted quicker, that means that ammonia, nitrite and nitrate will built up faster. YOU need to have a tank that is "cycled" fully to have a full fish load in it. Also remember that the only oxygen that is getting into the water is through the surface of the tank, think of yourself having to breath through a straw, the larger the straw the easier it is to breath through. The same applies to a tank, the larger the surface area the more oxygen can be taken in. If you need more information go to aquariumpros,com and they will give you lots more information to help keep your fish alive.