its a little hight at the moment Mash, its 2000L p/h, Adriaan suggested making it 800-1200 (comments plz)
With the skimmer's return fully open its in the skimmer neck up to the collection cup if that makes sense?

sump is about 60L to 70L.
chamber 1 - where overflow comes in and feeding and returning skimmer
chamber 2 - bio rings
chamber 3 - carbon
chamber 4 - return to tank and some LR
