Quote:
Originally Posted by whatcaneyedo
The owner commented that he has seen patches of the anthelia crash occasionally in the past and although I've never experianced such a thing in my own system I have had Xenia colonies crash from time to time. So even if the water change water's chemistry wasnt too bad I think something about it did still trigger the anthelia to start dying (and this tank had A LOT of anthelia).
This tank is in a public institution and not a private home so there are a lot of unknown variables unfortunately.
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If you can stick a powerhead near the water level to add oxygen to the tank