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white crust
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  1. Pests, Hitchhikers, and Diseases
    OK...looked thru posts but to no avail. Few of my green polyps that I have had a while now are staying closed and have white crust stuff or almost looks like grains of sand all around their outer edges. Some with this stuff still open up but I have actually had a couple completely disappear...
  2. Tank Specs
    I just finished cycling a new 24 gal Nano and added cleaners and a fish. There is a white crust spreading on my live rock. Where it's thickest, it looks like frosting on a pop tart! Is this calcium precipitating or something? Very strange... Nitrate <15, Nitrite 0, pH is 8.4 and alk about...
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