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I've overdosed lime and hit that reading with no problems. What test are you using on the phosphate? Rare that you can pick up any at all, though you may have algae. Definitely corals won't like that or the nitrite.
I'm inclining toward the low oxygen theory, myself, however. It just should not have hurt them on its own. Reasoning: it happened in the dark, during the oxygen low of the tank.
Do you have a fuge? What is its lighting cycle? A skimmer? How potent?
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Sk8r
"Make haste slowly." ---Augustus.
"If anything CAN go wrong, it will, and at the worst possible moment."---St. Murphy.
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