Thank you for your replies. I'm running an euroreef skimmer. I'm not exactly sure of the model but it is about 8" around at the base has a blue lid and the straight pipe with the round foam over it. I'm getting pretty good skimmate with it. I also have about a basketball sized ball of chaeto in my sump. It's gone way green and happy looking since dosing the tech. Perhaps I need to throw some out. Maybe it's holding phosphates? When I test for phosphates it is always at 0. Same with nitrates. I did have that brief flare up with nitrate but it only lasted a few days then went back down to undetectable. I have taken some pics with my phone but I don't know how to get them to upload. As soon as I figure that out ill load em. Right now it's not very out of control, I'm just hoping to nip it in the bud. I'm thinking of maybe getting a sea hare and try that as well. I guess it couldn't hurt. Thanks for all your help.