Check these sites for info on light requirements
Depending on the lighting you have, you may need to dose NO3 (nitrates), PO4 (phosphates), K (potassium), Calcium, Magnesium and some kind of trace fertlizer. All of these can be had from Seachem although I use dry fertilizers since the price is much lower and it is easier to regulate exactly what I add. Traces and K should always be dosed, IMHO.
Dry Fertilizer Link
~One site edited out due to certain circumstances. Pls request for Admin's permission whether the site is allowed for posting or not.