I have purchased a DSA 24" x 24" x 14" Frag tank and stand. It came with a free ~10G sump. The LFS said just to use ChemiPure and Phosban in the sump, wil that work? My experience is only with a refugium on my DT. I am planning on having no substrate in tank, just eggcrate. Any help or suggestions would be aprreciated. Thanks.

