The biowheel and the floss are just creating nitrates, of course they are also nitrifying the water, consuming the ammonia and nitrite. If you do not have enough LR
to preform the task of nitrifying your water, it is ill advised to remove your filter media. If you have a DSB
and 1 to 1 + lbs per gallon of water...then you can remove the media and the rock and sand will nitrify the water, as well as denitrify it, reducing nitrates.