No I have not been putting ferts in yet. my GH is around 10 which its medium hard water so thats why I have been doing the c02. My nitrate kit is in the mail. I looked up N.P.K. and as you know its a fert. I have florish why would I use that also? My RO right is also in the mail, shouldn't that be enough to get the minerals in the water?
I'm not familiar with Flourish. But I think it is your trace elements, not your Potassium, Nitrate and Phosphate(NPK) Do a little more reading around here and you will get it straightened out.
Co2 provides carbon which is a necessary element for plants to grow. It will lower your ph. I'm not sure that it does anything to your gh.
Filstar Pimp #61
29 tall, 130w/cpf, Pressurized co2, XP2, ADA amazonia substrate, ph 5.9-6.3, gh,3 kh3, Dosing w/Greg Watson ferts, using the estimative index method. temp. 78-82.
4 ottos, 2 sae's, 1 clown loach, 8 cardinal tetras, 9 rasbora espy's, 2 botia sidthimunki, 2 tuxedo gouramies, 4 amano shrimp, 3 cherry shrimp