Supplement actinic lighting for clams: my clams like it and so do I! Once the 6,500k 400 watt sakis kick off, then the 20,000k 400 watt Ushios kick off, then the 10,000k 65 watt pcs kick off, the 40 watt NO actinics and the 65 watt pc actinics look GREAT after a hard day of sun bathing.
Jim