Black Algea? What is this?
- Thread starter mikelee031
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It appears to be a new rock, so I'd call that die off, and not algae.
I had an attack of small starfish that were eating the purple off the rocks... got a harlequin shrimp to rid me of the pests but I have some work to do to get all my purple back. This is on a rock thats out of direct main light. This black spot has been getting bigger and it sheets like slime algea.
Ok, can you get a clearer pic of that rock?
It almost looks like a patch of Cyano.
Ok, now it looks like the Black Sponge
I'd suck it outta there.
I'd suck it outta there.
saltyphish
Certified Sand Groomer
cyano is a bacterial growth similar to algae. It is both annoying and bad depending on how difficult it is to remove. While increasing flow in the area where the cyano is may help it does not always cure the problem. Cyano can feed on both nutrients and/ or light. What are your nitrate, phosphate readings?
Update: Ok think I figured it out. Had a phosphate boost. My harlequin shrimp is eating all my small starfish (which i need her to dp badly)and she leaves behind a small carcass. I have put in a GFO to help pull it down. So far so good.
Rock looks easy enough to remove. During a water change I'd do so and treat area with H2O2. Rinse well in old tank water, replace.
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