Jim I would have your calcium and alk levels checked with another brand of test kits. 180 ml is a lot for your sized tank. Also, I have a spare oceanrunner 2500 if you want to see if it fits in your return chamber.
Mark from LC? Thanks for the offer but I do have a spare on hand so I am not running without my sump right now. I dont think its the pump I need to figure out why my CA is precipitating so much. Will try another test kit soon