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The higher the nutrients you have in your tank, the more unicellular algae such as zooxanthellae the corals are taking in and some species (most all sps) will then brown out and yes not extend polyps much anymore. If you were to actually strip the water of all nutrients, you would kill your corals (this happens when you go too fast with ZEO). Many ZEOvit users have some of the nicest colors and growth, so they certainly are not starving corals--the fact that so many ZEO users see a big increase in growth would indicate that its actually the opposite. This is why many ZEO users have to "up" their bioload and feed heavily. Last edited by GreenSpottedPuffer; 01-23-2009 at 07:46 PM. |