SG is 1.024 ....has been between .023 and .025 since start up.. I check this weekly. On the water flow - I have a valve on my pump that feeds my chiller so I can throttle the flow back - I have to or else I would have everything blowing around in my tank - too much...water flow is extremely good. Three outlets on one end of the tank off of one pump, and two outlets at other end coming off my chiller pump. Also have two Maxi-jet 1200 powerheads with rotating deflectors so I have a wide variety of flows and currents in the tank.