I might hop on a really good offer of $30 for a maxima clam that looks around 3-4". I'm just wondering if my tank is able to support it. I use to have a phosphate problem but I bought a reactor and rowaphos and the phosphates are slowly going down. Last check it was .25. I will check other levels after this post and keep you updated. I have an off brand t5ho fixture with 3 12000k bulbs and 3 actinic bulbs. Midday they all run. 97% of red slime is gone and tank has been up for almost 6 months.