Very cool seems simple which is the best part only question is wouldn't u want ur sps corals to get the surge of water coming into the display ? This one seems to pull x amount of gallons out of display then slowly refill till process repeats?
Will the sudden surge of water being flushed out of display be same as a surge that flushes water into display ?
Excellent Question, Let me explain what will Go on in theory during one full cycle, starting with the return Pump. (this will be the basic layout not including baffles, or any technical jargon for ease of reading. The tech stuff can and will eventually be explained)
FIRST THE STRUCTURE
Return Pump will send water up to Display from the Sump. The return line is placed @ lowest water level in the Display in the form of a Spray bar, (hole size yet determined). Lowest Water level is 1/3rd from the top of the tank. Max level is 2 inches from the top
A power head will be placed just below the lowest water level pointing Slightly downward. (definitely one with a magnet as suction cups will fall off. Possibly even superglue it on)
The Display tank will be set up from right to left as a hill, the peak covering the surge pipe. This will serve as the top of the reef and house the zoanthids. The rocks will also sever as a bubble trap, to keep maximum suction. The tank will be Bare Bottom.
The Tank Drains onto the ATS and back into the sump to be heated/cooled/what ever, it will have a DSB of 8 inches for a conch and Detritus will settle on the sand.
Then Back to the pump.
NOW THE ACTIONS
Upon plugging in the return pump, the spray bar will blast water into the tank. @ the same time the powerhead will be blasting air and water into the tank until the water goes up an inch or so
The tank will fill up at a slow rate like a calm ocean wave coming in. The power head will only be moving water at this point.
When the tank is full, the siphon will take (estimate) 1/4 the time to drain as it does to fill. This with the power head keeps the DOCS mixed in the water to feed corals and get sucked up by the drain at a decent rate. @ the same time never allowing settling of Detritus.
The surge will be drained onto the ATS and into the sump, Filling up until the surge is over to be drained again into the Display.
I hope this will help understand. Ask away if not, i can describe each aspect in detail if need be.