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Old 06-15-2006, 03:21 AM
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IME Hagen test kits are not that accurate. If possible can you take a water sample to a LFS and have them test it? (not sure where you are located) or if not maybe have a fellow reefer test with their test kits to verify your readings. I have also found that a proper level of magnesium is very helpful in promoting good coraline growth so you may want to test for that. That should not be leading to snail deaths though. Do you acclimate them when you get them or just drop them into the tank? Phosphates can lead to invert. deaths so that may be a culprit and you phosban should help. None of the popular test kits will give you an accurate test for (I always forget inorganic or organic) phosphates so it is kind of hit and miss. Also if you have cyno algea - which I don't see in your picture - it can be consuming the phosphates so you will still get a nil reading.
Not much help I am afraid but your reading would indicate that things should thrive in your tank. Any chance that the tank, rock or anything else may have been exposed to copper? That will quickly lead to invert deaths.
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