i hv kept clams under my nova pro t5 for the past 2 plus years. i dont see an issue. my clams hv been growing. in fact, my deresa grew from 3 to 8 inches. u will see many clams under t5 if u google it. i dont understand why people immediately think clams cant be raised under t5 without doing thorough research 1st. with ur light, it isnt an issue.