I have a biocube 29 with a 6500k 36 watt LED light, I cannot afford CO2 or expensive fertilizers (though I have Nicolg fertilizer). I have had several plants and the only ones I have left are a cardinal plants (dying), moss balls, duckweed and banana plants (dying too). I've lost four leaf clovers, rotala indica, various ferns, and all sorts of other plants, here is a video I made when I first got the plants and I was asking for help as to why they were all dying.