One of the things I like about dichlor for startup is that it's the second quickest way to get CYA in the water (pre-dissolved, liquid CYA being faster). No need to wait; when the dichlor's dissolved, the pool has it's CYA.

1) I would continue to chlorinate as needed with dichlor / Borax until a total of 4 lbs (about five 3/4C doses) of dichlor are used. At that point (a few hours after the latest dose of dichlor), measure CYA and report back total dichlor used, current CYA level, pH, TA, FC and CC.

2) Sort of. FC of 1-4 might be kinda low. Please consult Ben's Best Guess Chart and find FC range for given CYA level. This can be reduced a bit for SWCG users who run SWCG during daylight and swimming times but tweak that later - let's get the pool running now.

3) Nope, dichlor until CYA level is established then get chlorine from SWCG, supplement with bleach as needed.

4) email pictures to poolforum@gmail.com, reference thread 23425.

edit: Uhh ... What PoolDoc says goes.