Being old school and back in the hobby in always went for as sterile nitrate free environment I could. Of course the consensus seems different now. I've had a nitrate level almost to 80 and introduced Bioplastics to bringing down, which it has. My question is if i use it to maintain a lower nitrate level and still getting green algae on the glass can I assume the nitrate level I have it at are high enough to promote growth without killing stuff with too high of levels?