I have a 55 gallon tank in my apartment and the water looks great but some fish have been dieing.
I'ts my roomates tanks and all he uses is R/O water. Would a lack of salts/minerals cuase them to die? The ammonia content is good, water changes every 7-10 days with a vacuaming of the gravel. has a bubbler and 2 filters. It's a tropical community tank.
thanks for the help before any more fish die.