I do excavation,demolition and retaining walls. The season has just begun so I don't have much spare time. Sorry if I miss any ones questions. My phosphate levels before the rowaphos were just plain higher. Not trying to be stupid but I don't recall the actual number. NHReef thanks for the compliments but most of all I'm glad you learned something. Thats what Reefcentral and Boards just like it are all about. My tank is just another way to skin a cat. Progress report- The hair algae is almost totally gone thanks to the rowaphos, but it has and is still taking a toll on some corals. The colors are really starting to come through as well. Time will tell where things go.