I say "DO IT"
My pool is a 27' AGP with about 17,000 gallons. Last year I spent over $700 on chemicals trying to get it right. Even with those $, I still could not get the h20 clear. Also, after doing research, I have serious questions as to whether BQ really adequately sanitizes a pool.
I started by replacing about 1/3 of my water. This made the conversion go faster and cheaper I believe. You should ask the experts on here about the water replacement. It may boil down to cost or whether or not you are on well etc.
So far, I've used about 40 gal of 6% bleach averaging $1.69/gal.= $67
I bought CYA 10lbs for $17.
baking soda from BJ's wholesale $4.69 for 12lbs.
Wife already uses Borax in laundry.
I'm almost done the conversion, so I figure I'll shock a few more times. After that, I don't think It'll cost me more than $50-$75 for the rest of the season. This year will also include the $58 for the tf100 test kit, and $30 donation to maintain this website. (I think everyone who partakes of the site's intellectual property should consider donating)

And the water is already clearer than I've seen in years! The degradation was so gradual w/ BQ that I did not realize how hazy my water's been!
If you replace some water and don't add any other BQ chems., your conversion will be less costly (compare your pool volume to mine-17,500gal) and well worth it.
Good luck with your conversion!
