I don't know. I have been wondering why everyone says it needs high light and CO2, I have neither. I do however use Seachem products daily,scaled down for the size of the tank.I dose according to their chart, minus the trace. Lighting is a single 13 wt T-5 6400K desk lamp, and the tank gets a few hours of sunlight. Substrate is generic peat & compost soil, topped with fine gravel & sand. I syphon out anything unsightly, several times a week. I am using RO & tapwater with Prime.