My tank will be two years old in august. I am still getting green algae on the glass. Is this normal? What causes it. The only thing I check is PH(8.2), Amonia(0), Nitrite(0), and Nitrate(50). Now I have five fish in a 55 gal. The algae is like a hard texture I have to scrape it off with a razor,its not slimy. It really baffles me.
Lou
Lou