Jackdp wrote :
Your main question when purchasing lights should be What do I want to grow under them.
Exactly. Without knowing the kind of corals you want to keep, its hard to give advice.
, I didn't know exactly what I wanted to keep either when I first got started either. That is why I decided to purchase my a 250w MH
. That pretty much allows me to have any coral I want.
Just a thought anyway...
also what chemicals will i need
You may not need any as this also depends on what you want to keep.