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I have a tuxedo urchin that hasn't moved in about 2 days. all his tentacles are out but he's stuck to the glass pretty good. How do I know if he's dead?
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A decent amount of coraline, but much of it gets covered by cyanobacteria between water change (when I suck it off the rock). I have GHA, but it seems to keep to two specific rocks. Diatoms are visible on the glass about a week after scraping.How much coraline and green algae do you have?
A decent amount of coraline, but much of it gets covered by cyanobacteria between water change (when I suck it off the rock). I have GHA, but it seems to keep to two specific rocks. Diatoms are visible on the glass about a week after scraping.
Why do you ask?