Ok I tested my new tank last night and my current Mantis Tornado 500gal (2000lph) DC return pump on the highest setting wasnt causing a level drop in the sump. There was also very little skimming action on the surface. My tank is 90x45x45cm (36x18x18") and the sump is 50x35x35 (20x14x14). I am running a 3/4" return and an 1" drain through an ghost over flow box. I have about 5' of straight pipe, 6 x 45* unions and 2 flow through Tees that will be feeding a chiller and ATS. I could adjust the wier height and gate valve return to get a nice tank level, overflow level and silence. However there was little skimming, no level drop in the pump chamber. My fav lfs is out of 4000lph pumps but has a 6000lph. I have been searching all morning to try to find the min lph on setting 1 but no luck. I did find the syncra sdc66 had figures of 530-1450gph... i know this is a leap of faith but the other pump should be in the ball park of these figures i am guessing. On the lower setting it will be more economical to run.
Thoughts is the 6000 too big, I know it is but the better question is will it work
Cheers
Thoughts is the 6000 too big, I know it is but the better question is will it work
Cheers

