This product showed up on Wednesday or Thursday of last week and I started dosing it along with Coral Snow. Lately, if I leave any of the whites on by late in the day I've got a pretty good mat of cyano on portions of the sandbed. Today, after turning the whites up early on Saturday, I've virtually got nothing. Time will tell but so far it seems to be working very well for me and absolutely no side effects that I've yet to witness.
Dave
Dave