Hi, I've tried (with no success) diatoming it, algaeciding it and a treatment of eurymyacine. The filters were literaly dying-s l o w i n g d o w n. I now have two Fluval submersibles on the 55 gl. tank. I think I'll try Myarcine when I go back to the tank on Fri (the tank belongs to a customer of mine). Ray ------------------ To unsubscribe from this list, please send mail to majordomo@thekrib.com with "Unsubscribe aga-member" in the body of the message. Archives of this list can be found at http://lists.thekrib.com/aga-member/