How often are you doing PWC
How much and what are you feeding?
Do you have a skimmer?
Lights and schedule?
Tap or RODI
water for evaporation and PWC
Test results (actual numbers) for temp; pH; Am [NH4], NO3
; NO4; PO4
What test kit are you using.
But, yes. I would remove the biowheel. It is loaded with the bacteria that converts ammonia to nitrite and nitrite to nitrate, so for a FOWLR
it's probably a great system.
Can you add some macro algae in that system?