2.4 lbs stabilizer should have brought your pool to about 30ppm - you may have lost some to dilution with the hot makeup water. Another pound to pound and a half should get you into range. Backwash before putting it in the filter so you won't have to wash it out before it dissolves. Wait a week after adding more to measure it again - no need to waste the CYA reagent.

Copper is an effective algecide. Intex has happy customers because their pools get less green. Intex wants happy customers.

The chlorine is extracted from the salt water between the titamium coated plates of the SWCG section. The copper bars in the ionizer section donate copper into the pool water.