hi i have lost two fish over last two weeks last 1 was yellow tang checked both fish no marks on them what so ever ...tanks prems are all good only thing that is high is my calcium..soft coral are in great shape any ideas would be great help tank size is 120 gal bow front i run skimmer have 4 power heads running mh lights on 8 hours aday 20% water change every 2 weeks with ro water
Thanks in advance kev
Thanks in advance kev