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What is that? Doesnt say anything to me unfortunetlyBump
Disregard please I reread you OP. It could be very possible that it’s keeping your nitrates low. I would remove as much as humanely possible then retest after 24-48 hours. If your nitrates shoot up it would confirm that it’s keeping them low. I would then take the normal steps to keep your nitrates low and starve it out. If it’s a bacteria issue maybe a UV sterilizer or maybe a dose of antibiotics would kill it.How diffuse is it? Is it confined to a specific area? Is it only growing in the sand bed?
I use salifert test kit. I think it could be some type of bacteria as since yesterday the water has a bad/strange smell.Looks like some kind of bacteria. I recommend manual removal and cerith snails which are great for cleaning sand. Mine eat most bacteria in addition to algae and diatoms.
Your nitrates aren't overly high. Most people that keep corals maintain nitrates around that level or more. Bottoming out phosphates can cause a dino bloom though. What test kit are you using for phosphates? Some don't have the refinement or accuracy needed to measure down to the desired levels to keep coral or prevent dino blooms. Most people with corals keep phosphates between 0.03 and 0.5 ppm.