Hi, The last thing I did before the clearing of the water was to turn off the lights on Mon. and have the secretary treat the tank for 3 days with an algaecide. I had tried the agaecide before, but with the lights kept on their regular cycle. 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/