Interesting. Today my reefmaf used 3 feet so far. Maybe I’ll dial back the return pump and see what happens.Lets "roll" back a bit here....
you're using the RS rollermat and your water is not clean and clear?
i'd focus on that rollermat - your water might be passing it too quickly (?)
not to mention.. it beats the purpose of having a rollermat and waste of money imo.