Your TA and pH are fine right now. Don't worry about your TA at all. Worry about your pH if it gets below 7.0, but then just add some Borax to bring it back up (the dichlor is driving it down). Your FC of 2.5 or 3 is fine as long as your CYA level is less than 30 ppm. Once you get to the 30-50 ppm range, you need to keep no lower than 3 ppm of chlorine in the pool.

You can order new powder from several places, including Amazon, Taylortechnologies, or spspoolspas.

Janet