I just set up a 7.5 Gal rimless nano with a 10 gal sump that has approx 7 gal in it. I have 11 lbs of base rock and 1 lb of live rock. I have a ball of cheto alge in the sump for nitrates and a 1.5 inch sand bed in the display tank. My water parameters are excellent. I used RO/DI water from...