How exactly should I go about using RO water?
My tap water has ammonia so high that it killed a Betta within hours (I didn't know at the time, but I do now) and it's somewhere between 2-4 PPM. Once my RO filter is set up, I'm going to use RO water in the tank because of this.
The problem is, I'm using CO2. The PH has shifted between 7.2 and 6.2, so it's getting a little low already. With RO water, it'll obviously drop much further. And there's the issue of having absolutely nothing beneficial in the water for plants.
What additives do you recommend that I use?