thanks bushkill. you know when i did a super massive gravel vacuuming, i thought i finally solved the riddle of algae problems. but 3 weeks on, it starting to come back. i cannot do another super massive vacuuming again. so yeah, controlling algae is proving to be extremely difficult.
can i just put the phosgard in a filter bag and let it hang inside my tank for, say 12 hours? or it wouldn't do its job?