I have a 150 with 384 watt PC strip that is only 8 in. wide and 72 in. long. I believe this is to narrow and is the root of my problem (Ludwiga is green, Water sprite is brown, with a little hint of green) Its C)2 injected and I use the EI method. There is black and green Algae growing on the leaves and glass so I cut back on the amount of all ferts to starve the Algae out . I think more light is needed but would like other opinions please