gear-head
Aquarium Advice Freak
Is this just coraline algae, it's growing in spots all over the back glass as well as on my base rock. Or is this something bad like cyano?
Nothing directly but indirectly kalk will precipitate the PO4 from the water added. Phosphate (organic and inorganic) more than anything else is the issue with cyano. Remove the PO4 and you kill the cyano.ClamKnuckle said:I have a question about that article....what does topping off with kalk do to prevent/rid your tank of cyano?