Help Identifying Spots (Algae?) On Epoxy

CayoHueso

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Has anyone seen spots like this on epoxy before? Not sure if it's algae, a pest, some sort of process with the epoxy, or if the crab or snails have been picking at it? The tank has been up and running since the beginning of January. I added the epoxy about 2 weeks ago right before I added a small cleanup crew (emerald crab, Nassarius snail, dwarf Trochus, Cerith snail). These marks appear to be all over multiple epoxy areas, but only the epoxy and not anywhere else. I used tunze instant coral gum.

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shakacuz

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could just be the epoxy changing colors due to its "cure time". i wouldn't be too concerned.
 
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