No, the 3M ColorQuartz doesn't change water chemistry, It's ceramic (inert) coated quartz (also inert). I believe I"ve got it in about all of my 20+ tanks.
As far as lights-there's no rule in an unplanted tank. I just by the full spectrum fluorescent bulbs at WalMart for $6. The fish don't care and would probably be more comfortable with no lights at all. If it's a planted tank, I have no idea.