My question was not pertaining to the fact i have algae right now ...right now everything is good more or less a precautionary measure i wanted to add the phosguard heard good things about making phosphate levels drop quick and dramatically i also run chemi pure elite with the ferric oxide which will take care of phosphate also just wanted to make sure if i added it did not cause any issues some how chemically mixing the two medias cause i would put them in the same chamber ....as of right now i have purigen, chemi pure elite, bio ceramic media , protein skimmer, and ammonia remover media just incase in future at any point something dies off and i can't get to it at least I'm one step ahead in removing ammonia thanks for input