1. Get a real skimmer -- Deltec MCE600 will handle that tank size, but definitely pushing it with that bioload
2. Fix the RO membrane
3. Ditch the biowheel once the skimmer is running well (not before then, probably need it with the bioload / lack of filtration)
4. Ditch, or at least seriously thin, the crushed coral -- and if any stays it must be siphon cleaned weekly
5. Forget all of the dosing, what is the point