Soldato
Not sure what more I can do with flow.
I'm at 100x turnover rate with the Nero 3 + Canister filter.
Only other thing I could do would to maybe add another Nero 3 and sync them up.
Have you verified that filter turnover rate?
I used to run two AllPondSolutions "2000lph" filters, when tested they were more like 700-800.