What's wrong with my back glass

RiaanP

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What is wrong, or is it "OK"

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The coraline algea are like peeling off, and since this past weekend the cleaner shrimp are walking up and down the back glass. Something they never done. Or does this happen and I should sit back and ignore it.
 

jacquesb

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Hi Riaan - this does not seem like corralline algae to me. Rather some green diatom-type algae.... or something like it....

I would suggest measuring your water parameters again. And ensuring that you do not have any issues with any of it....

This actually looks like the algae is busy dying off - perhaps your nutrient levels/phosphate levels have dropped.
Have you recently added some type of phosphate remover perhaps? Or upgraded your skimmer?
 

RiaanP

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I got a useless Aquamedic skimmer. My brother fiddled with it, and for the last two weeks it is actually working, not cupsfull, rather like a third every second day.
Also did a 60L water change, first one for two months. And up the salt as it was a bit low.
Will check the phosphate tommorrow.
 

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