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Old 02/21/2020, 08:58 PM   #6
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Join Date: Jan 2015
Location: Fremont, CA
Posts: 9,514
I had it just the same, nothing for a year or two and then the males in the system started getting bubbles.
Even if you don't change anything actively the system changes: detritus starts accumulating, some bacterial strains decline, other strains start to thrive, algae change,...
In my case I suspected it was bacterial strain shift due to a green hair algae flare-up.
I treated it by separating the affected males from the females for a while and did a deep cleaning of the tanks.

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Pairs: 4 percula, 3 P. kauderni, 3 D. excisus, 1 ea of P. diacanthus, S. splendidus, C. altivelis O. rosenblatti, D. janssi, S. yasha & a Gramma loreto trio
3 P. diacanthus. 2 C. starcki

Current Tank Info: 200 gal 4 tank system (40x28x24 + 40B + 40B sump tank + 20g refugium) + 30x18x18 mixed reef + 20g East Pacific biotop + 20g FW +...

Last edited by ThRoewer; 02/22/2020 at 02:51 PM. Reason: Fixed auto correct error
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