Anthony I thank you for your repsonse as I am a great admirer of your knowledge and work....I have thought about a close loop system (lack of PH in the tank) but am limited in the room I have to place an external pump. I would also like the ability to moderate the flow (wave action).Being a non-drilled tank I am not real sure how to get flow to a pump if decided to go this route and to figure out how much GPH pump I would need.....I have seen your closed loop example and loved the idea, but am not sure I can handle this task, but I will do more research on it!
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90 Gal. , 1-False Clowns, 3- Green Chromis, 1- Royal Gramma, , 1-Purple Tang, 1-FoxFace, Astrae, Cetrith, Nassrius snails, few hermits assorted, 4 emerald crabs, 1- Serpant star, many micro stars. | 
