Hey there, I guess i'm confused to your question if you have one or if you're just sharing your build? Lots of information on here if you search phosphates or anything else you may need. If you can't find it, I'd try to be a bit more clear what you're looking for. Should be able to find a good method to lower Po4. Seems like you have a lot going into the tank with not a lot to consume it. I'd probably start with cutting that back.