Well I am new to this forum and new to having a fish tank. I started out with a 29 gal tank and put in river rock instead of small gravel. I also have a heater one of those filters that make that little water fall from walmart. I have spent a lot and the darn fish just died. What I am wondering is what i did wrong or what I need to change. I have been thinking that it might be the rock i used? Would an undergravel filter help the rocks do build up a lot of junk. Any advice would be greatly apreciated. I lost 4 fish from ick and dont want to loose more.