12 african cihlids 55 gal. 15% or 20% water change about every other week all of them with a gravel vac..,,,,,,,,,,,,I just checked my 20gal. salt water tank and all the color codes were perfect on salt water chart. so i checked my tap water and the ph was a little low for fresh water. then i checked my fresh water and the ph is actually lower than the tap water????????is this normal? i am getting worried now......think maybe i put to much cihlid salt in there?........i dont know if its my imagination but it seems like my fish are swimming slower and lower..........somebody please give me some advice??????souuld i get some chemical? i hate the idea of putting chemicals in there..........would more cihlid salt help? or hurt?,,,,,,,,,,,,im about to panic at this point. :thud: .........MAN I LOVE THEM LITTLE FISH.........