Im in the process of trying a small 10 gal planted tank before i build a 55 gal. im using diy co2, sand substrate and about 3wpg using a compact flourescent bulb. my plants do not seem to be growing and are starting to get brown on some leaves. is there a product i could buy with all nutrients mixed in one instead of dosing each individually. i have not added any nutrients to the tank yet so what should i buy.