Good improvements. I think you want the lights a bit closer. Make sure you have good intake and outtake of air. Also think about space,they are gonna get big.
Don't listen to this guy. Do what you feel like doing. Acid is always positive if you are positive. Sounds like a good plan to me. peace. oh yea....GOD was in my acid by the way!!!!!
I found activated carbon to work for me. The trick is to make the room free of draught and have a decent cfm to push the air through the carbon. DIY if you can, or just go buy a nice little set-up. Good Luck!