I use koralias with my reefkeeper controller and they work fine. I do however get some reverse flow on occassion but they work.
have you tried unplugging them and replugging in? I had a similar issue with my ATO on my controller and thats what it took to set it right.
__________________ 180g Reef - 60g Rimless Reef -90G FOWLR- 125g Malawi Cichlids- 40bREEF- 34g Fresh Planted-working on- 20L FOWLR- working on
I have a mix of many different saltwater fish amongst my tanks, but I love my Tangs most of all.