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Arnar, you have a great project going... If you are going to keep SPS in your system. I think you will need about 2-3 times the amount of flow, you are projecting. I have a 500 SPS system with about the same flow you are planning for a 2,000 gal system. I use a Hammerhead CL around 5,000. Iwaki's 100 (1) for chiller return. Iwaki's 70 (4) on sea swirls. And (4) Tunze 6200 on controller.. Works out around 23,000 gal per hour with only (2) 6200 on at a time. And no head lose figured in. As my corals have matured. The need for more flow has increased. I don't know what your power costs are, but i run around 400.00 a month just for electricity... Can't wait for updates.
Happy Reefing
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