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Could be calcium left from coralline alge that was killed from the bleaching?
coralline will grow on any surface.It’s not green or red. Appears more purplish/blue which I guess is Coraline color….Thought Corrine mostly grew on rocks? Looks like large ameba’s I remember from my high schools science class,,,,,
Fixed it.coralline will grow on any surface that you don't want it to.
lolFixed it.
Don’t see much a difference but here you go….looks like coraline algae not an issue if it is. Got a white light pic?
Was there a lot of coralline before you bleached it? Looks like whats leftover from when corraline was there and is now "gone". If you didnt scrape it off or polish the glass before or after the bleach it could be what we are seeing. If you did may be the start of new but typically it starts as much smaller patches.Don’t see much a difference but here you go….