I want to grow plants in my aquarium. All I have is a Nutrafin CO2 set, which is actually for just a 20 gallon, but it'll work for me hopefully because I really don't want to buy another one just for 10 gallons more. Anywho...I would like at least 2 wpg or more. I have asked this a couple times, but this time I am actually ordering. So, can someone please help me find a cheap, fitting light. I've been looking but I don't know that much about it and I don't want to get ripped off. Thanks.