Yeah, I don't even have one watt per gallon, lol some how I still have success, and I still get a nice light red. Maybe I can buy you some bunches at Petsmart as well, if they are algae few if i go there, I will grow them out first though.
What's the lighting on your tank? T5 HO?
15 Gallon NPT
1g no tech bowl in the making