ok i knew you guys were gunna ask me about the water and i know that stuff is important but i really dont know what they are.I'll have to break down and shell out thecash for testing kits.It's something i've been putting off for years.I can tell you it's a 30 gallon tank.The cat is only 3 in. max ...

for some reason my buddies s.a.r.t.c. will not eat every thing else in the tank is eating.right now he's all head and is really skinny.I haven't seen it eat in three weeks.I feed the tank bloodworms,sinking carnivoe tablits,alge disks,also there's feeder fish in there.Any Idea's