New to growing need some tips,HELP!!!!!

I just bought an indoor hydro system, that looks like a computer tower........SOOOOOO COOL!!! Where do I need to keep my ph and I'm running the lights 24-7. Also when should I start to use the grow solutions. When should I go to 12-12 light? Help me !?!?!

welcome jack,try posting ur questions on the indoor growing, there will b plenty of people there who will gladly help u out,