Nitrate and phosphate are a tad high imho but shouldn't be an issue to why you're losing croals. How do you introduce corals to the tank?? Why I ask is you could be burning them to death due to your water clarity. Start them from the bottom of your tank in high flow areas or decrease the time your main lights are on.
Last edited by props; 04-06-2013 at 05:37 PM.
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