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What chances are there of success and at what point should the sponge be removed to avoid negatively impacting water parameters?

April 26, 2017avoid impacting Negatively parameters point removed sponge success water

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What chances are there of success and at what point should the sponge be removed to avoid negatively impacting water parameters?

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My next question was regarding setting up another pump in my tank. Currently, I have a mag 9.5 driving the filtration and it is the only source of water movement in the tank. This setup was originally designed to accommodate an aggressive fish only tank but it has turned into a reef after all, and I don’t consider the mag 9.5 adequate water flow. My idea was to run another mag 9.5 outside the tank, drawing water from the surface of the tank and returning it on the opposite side. This flow of water would oppose the flow of the main filtration. The return from the sump is forked into two outputs to spread the water flow and I was considering the same on the second mag 9.5 so as to not have excessive water flow in any one area. My main concern is the overflow rate. My tank is drilled on the bottom and has an overflow box with a Durso pipe. How big will the intake pipe need to be to ade