Thank you so much for replying, I wasn't sure if I'd get help on this. I've started giving the flourish fertilizer. I got the light on amazon here. The light is on 8 hours a day, and I use the warm white setting. Is there a difference between cool and warm light, or is it just aesthetic? It hangs about 4-5 inches above the bowl. I heightened it just now to about 7 inches. Should I keep the light time? I have salvinia minima but it needs to grow out to actually give any shade. Again thank you for the help!