New pool owner, need some guidance please

[BigDave]

Does the P-A-P chlorine list it's concentration? Adjust for concentration and size (of bottle) and then compare price.
I would think it would be better to wait until you've cleared your algae to set up your CYA (stabilizer) as stabilizer inhibits chlorine's abillity to eradicate algae.
Turn off the chlorinator for now and battle the algae with Bleach / Liquid Chlorine whicever you can get cheapest (concentration * size) / price - they're both sodium hypochlorite solution.
When you can hold your Free Chlorine at shock level overnight (no feeder) + one more day at shock, then, if you have tabs left, you can use the tabs in your chlorinator until you get your CYA where you want it. Maybe someone here can tell you how many tabs you might need to raise your CYA level. Why buy CYA if you already have a bucket of tabs that contain CYA. Be cautious, too much CYA is a BAD thing (so is too little) and may give you an algae problem that is much harder to fight. Read the stickies on this forum to guide you regarding proper CYA level.

Good luck, Be well.