Thanks Chris - I got the idea of using the Eheim from one of your build posts. I will get a proper reactor when I get the stand/sump done but this is a quick temp solution. I do have ball values so I will play with that. Should recieve the Ecobak and bacteria any day now. My phospates read .39 on a hanna checker so really need a quick solution. I currently have two eheims with cloth bags in each with the phosguard stuff and got the phospates down from .89 three weeks ago so ecobak should do the trick to get it even lower.