Inherited a pond, trying to turn it into a pool!

I think I can finally claim victory - three nights in succession with no FC loss. CC tested today with a 25ml sample is 0.2ppm or less - one drop cleared the solution. The filter has run for three days straight without gaining more than a couple psi.

So... I'll let the CL drop down to 6 or so, check and adjust pH, and then add some CYA. Back on page 1, when I thought I had 40k gallons, 6lb of CYA was recommended. Now that I know I'm actually around 20k gallons, I assume I should add about 3lb? I guess once I get all my levels within the ranges here: http://poolsolutions.com/gd/poolsolu...try-guide.html then I'm good to go?

Awesome news -- finally!! Congrats!

In a 20K gallon pool, 3 lbs. of stabilizer will add about 20ppm of CYA.

Ranges:
Chlorine --- based on your CYA level. See the Best Guess chart in my signature below. (If you let the cl dip too low, you'll risk an another algae bloom.)
pH -- 7.2-7.8
Alk -- 80-125
CH -- not needed in a vinyl pool

Stay in these ranges and yes, you'll be good to go! Test chlorine daily, pH once or twice a week, alk every 2 or 3 weeks.

Enjoy your pool!

(For reference, in your pool, each quart of 6% bleach will add about 0.8ppm of chlorine. Use that to help you determine how much bleach to add each evening when you test.)