as the water is pumped into the main tank, it spills into an overflow box. the overflow box then gravitiy feeds back into the sump. so the height where the water spills over into overflow box will be the constant height of the water in the main tank.
- 75 gal
Amiracle SL-350 Wet/Dry (no bio-balls)
AquaC EV-180 Skimmer w/Mag 7
2ea Maxi-Jet 1200 & 2ea Maxi-Jet 900 PH
Captive Purity Refractometer w/Calibrator
LCD Digital 250 W Titanium Heater
48in Coralife 4x65 watt PC
Won Pro Heat II
Tunz level alarm
Approx. 200lbs Sand (3-4" DSB
unit - 110 GPD
Please feel free to advise me!