What plants, what size tank, and how much light do you have?
The dead coral probably raised the pH pretty high, but I'm guessing you may not have enough light (since they are browning..).
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*Kristin*
5 Planted tanks:
55g, 40g, 29g, 10g, 5.5g
10g N. multifasciatus tank, 5.5g Platy fry
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