Nitrates help Please

[dareefguy]

I have a 350 gallon system mixed with fish lps and sps. My display is 180 with 3 inches of sugar fine sand 250lbs live rock. My sump is 120 gallons with a higher flow 10 inch mud sandbed. Inline I have a 25 gallon refugium with 5 inch mud sandbed. I run a big arowfoamer skimmer, with ozone.

I moved my tank about 4 months ago and now I cannot get my nitrates down below 25 ppm. Maybe my deep sand beds have not kicked in yet?

I also have a problem with free floating detrius but have been removing that with sponges. I thought if i hooked up my fluvel 305 I could get rid of that, and if I kept the sponges clean then It would not increase my nitrates any more. If you are not supposed to use sponges because they increase nitrates then how do you remove the detius?

I was also wondering peoples oppinions on nitrate filters.

Thanks a bunch Chester