Any ideas what's floating? Food? Sand?
If it's food: a) Feed less b) turn the pumps/powerheads off until feeding is over and any leftovers have settled.
If it's sand: adjust your powerheads. If you bought that baby power super fine sand... well....
I had a sock at one point but I got too lazy to clean it. I will on occassion slap my diatom filter on for a day if the water looks dull. So you could slap an HOB
or canister on there for a day with a super fine pad in it.