How do you get rid of diatoms? I just can't seem to get them off of the glass. After like a week or so, the diartoms are covering the whole front glass. I have tested the water, and the ph is 8.3, nitrate 0 nitrite 0 ammonia 0 phosphate 0 Plz help! I really hate these algea that is growing, and I wqant to know what else I should do in order to get rid of this algea.:help: