Fresh fill with city water - start with bleach or dichlor?

[Mm_putnam]

Got the numbers just now...
FC - let's assume 0
pH - 8+. It's definitely at the top of the color chart and could be beyond a bit
TA - 20
CH - 10

[BigDave]

That's great, dichlor will help bring the pH down while chlorinating and adding CYA. Baking Soda will raise TA with little other effect. You'll need calcium as well, calcium chloride will do the trick.

[Mm_putnam]

Have been adding bleach since Friday. Added Friday afternoon and measured 0 again Sat late afternoon. Added more bleach (360 ozs.) and a couple hours later it measured well (FC at 5). Checked again this evening (Sunday) and back to 0. I just now added dichlor (bought it today).
Question - does this sound right? I'm hoping my daily loss of all FC is largely due to no CYA which the dichlor will help. And it's been sunny so that's contributing. Just want to ask if there's anything else I need to adjust. See full numbers above.

[BigDave]

Yep, dichlor will add CYA and you are losing all the FC to sun. Try not to let the get all the way to 0, test and dose throughout the day. Keep an eye on the pH now that you have the dichlor.