Water changes and carbon are probably the right thing to do for this one. Personally, I would change 50% of the water daily and change the carbon every 48 hours for ten days just to be sure it got completely cleared out. Just my opinion... --Cliff ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@majordomo.pobox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@majordomo.pobox.com. Search http://altavista.digital.com for "Apistogramma Mailing List Archives"!