Time to Take My Pool Back from Leslie's

[BigDave]

If you like liquid CYA and you don't mind paying the price, it's fine to use.

An alternative is dichlor, it will chlorinate (you need chlorine!) and add CYA. Dichlor will tend to push pH down so if you use it, have some Borax on hand to return the pH. I would be very careful about raising pH above where it is now (7.4) with the CH you've got. One pound of dichlor will raise your FC by a little more than 3ppm and your CYA by 3ppm.

OOPS! PoolDoc was posting at the same time as me. His advice about dropping your CH by dosing cal-hypo in the skimmer sounds good.