I can't offer any specific conditions but maybe some general ideas.
This MSDS sheet
http://www.solarsunrings.com/bioact...io-Active Cyanuric Acid Reducer 070915 V3.pdf suggests that it's an active microbial culture, 1-0.1% in dextrose. So basically a bag of sugar. As I recal the lowest temp incubator in the bio labs was 28oC but that was normally reserved for low temp culture experiments. When growing cultures there were lots of failures with ideal conditions which of cause includes the most ideal nutrient broth for specific bacteria and obviously we never used chlorine. So ideally a pool would need the be warm, no chlorine and have all the nutrients required. The ideal conditions for algae, however by manipulating the phosphate and nitrate ratio the environment can favour bacteria over algae but I doubt anyone would go to that trouble.
This patent
http://appft.uspto.gov/netacgi/nph-...37".PGNR.&OS=DN/20140342437&RS=DN/20140342437 suggests that they are isolating enzymes which would support their position that a given volume of the product will remove a given amount of CYA. If a live culture was used and worked, potentially it could continue to remove CYA every time the conditions permitted. Given the production method I find it had to see how they could guarantee a given volume of either active culture or enzymes.