Red algae looking stuff growing on coral overnight! (1 Viewer)

[decimal]

I know you’re thinking “that’s so dumb... carbonate hardness doesn’t even start with a K”.

The German word does though.
“Karbonathärte” so that would be carbonate hardness

 

[Maga]

Carbonate hardness. Measured in dKH or ppm.

Thanks, I thought so. But it was given already in two ways (meq and dKH) under Alk. So OP is measuring it 2-3 different ways?

Anyway, I fix upping flow in the area will be an easy fix.

 

[rrr757]

Just fyi, if chemiclean doesnt work try Blue Life USA Cyano Rx. I rotate between them, Seems my tank built up immunity to it, doenst happen that often but now I rotate between the two. If you havent used chemiclean , it does work wonders. Skimmer will overflow so I would lower water level and let it oxygenate.