liquid chlorine

[PoolDoc]

Hi Rainbow;

Buy plain 6% household bleach and add 2 gallons at a time in the evenings (~6 ppm on your pool).

Also,

#1 - Order a Taylor K2006 or 2006C kit (Amazon links below -- make sure seller is "Amato Industries"; other sellers have shipped the not-equal K2005. Amato tends to restock quickly.)
#2 - Read the "Best Guess" page, also linked below.
#3 - Test your pool as soon as you can, report the results.
#4 - Meanwhile, get a cheap OTO /phenol red testkit locally (Walmart?) and maintain yellow to dark yellow chlorine levels (3 - 10 ppm)
#5 - And, stop using the calcium based chlorine, for now.

[Watermom]

Nothing to add to what Ben wrote above except hi and welcome to the Pool Forum! Glad to have you here!