Proper Lighting

[cdhollan]

I am not sure what type of ballast I have or even how I would find out what type I have. It was just a no- name metal halide fixture. I do not have a sump either on my tank so it really limits me to the type of filtration I can have. I do water changes weekly and will have to retest my parameters because I am not sure off hand. I know my nitrates and nitrates and ammonia are all 0. Do you know a brand name bulb that makes a 15k halide?