Tinker, your guess is probably correct. I never liked dual ballasts, too easy to have issues and after switching to the Reef Flex Cube's I am happy as can be with the lighting at the moment...patiently waiting on the Kessil A350 to debut.
OP...if you do switch out ballasts at some point, take a hard look at the AquaMedic Reeflex Cube, it is just an inspired ballast at a very good price point.
OP...if you do switch out ballasts at some point, take a hard look at the AquaMedic Reeflex Cube, it is just an inspired ballast at a very good price point.