Tank looked great for about 18 months, then growth slowed and algae started winning. Replaced the AS with Eco-Complete, but could never regain the previous growth and vitality, and algae became worse than ever. Fought with it for several years, tried everything I could think of, and did my best to learn from the experienced folks on this forum, but had to admit defeat. Somehow, without the AS, I just don't have it. My question is, are their any others out there who find themselves similarly limited?