Thanks bros for contributing to my knowledge of FH and testkits in FS so far. The thing about putting other fishes in my tank with my FH. I bought 2 small FH from a FS some time ago. One had superb appetite and the other one quite shy and hides all the time. In no time, the always hungry one grew up to be almost double the other FH. And chased it around like it was a wanted criminal and attacked it until its fins etc are torn. It just died JUST NOW, just before the game where MU lost to Arsenal.

But my point is, by placing other fishes together with ur FH, you need to make sure its a cheap fish or else you might not have it alive the next day. Do you guys encounter any problems with this? Fighting FLower Horns....

So it means that one tank shud only have one fish living inside?
How do i maintain a stable filter system? I just have those that flows up into a filter and then back down again...