>I have never heard of green algae staying in a tank for three weeks. >Visability is about 14". HELP!!! >Does anyone have any suggestions on how I can rid this menace from my >tank??? A diatom filter will do the trick, especially with Accu-Clear in the water (although that is not necessary). A diatom filter is a little pricey (shop around--mail order is best) but it will work.