| Green water in a new pond will clear on its own when the biofilter kicks in. Has to do with the bacteria out-competing the unicellular algae for free ammonia, the preferred food of both. But, having the algae clear simultaneously with the BS/BH addition seems a very fortuitous coincidence ... degassing effect, plus additional surface area may have been just what was needed for the growing bacterial community to be able to outcompete. [This topic gets very complex & no time now to go off in that direction!] |