I have Reefer 350, I feel the middle (skimmer) chamber doesn't have enough water movement. I dose my Ca, Alk in this chamber.
Do you use powerhead (maxijet) or wavemaker(jebao) to make more movement?
I have a Hydor powerhead in my sump too. Although depending on size, you may need more than one. Mine only hits one area and kinda leaves detritus on the other, but it's hard adding more pumps in there.
