first things first my system has been up more than two years now and everything is fine ammonia, nitrates, nitrites,phos. all 0. ph 8.3, water temp. 79.1, and salinity 1.025. water changes done at 15 gal
bi weekly. RO
water checks out all at 0 also. I have been through 2 yellow, 1 kole, and now my sailfin is acting like he is going to die also. I have heard that tangs can get i think its called(lateral line disease) from a power head or any thing in a tank that is leaking voltage in small amounts into a tank. is there any truth to this or has any one else had this problem. I still have the maroon clown and the mandarin and the are as happy as ever. any ideas would be helpful.