If my CYA would drop to a level of X and I needed to up the level to Y.
Could i just stop using the BBB method and switch to pucks until my CYA level reached a suitable level?
Is there a reason I would want to only use a stabilizer?
Hate to tell ya', but you'd STILL be using the BBB----now TFPC method because you realize exactly what those chemical additions do and how they effect your pool water balance. As to which to use......depends on how fast you need to get where you want to be.
I had a giant vat of pucks leftover when I went to SWG, you can use pool math to calculate how many pucks will raise your CYA the amount you need. I do this all the time, pucks also bring down PH if you find it rising often and add a little salt....
stabilizer should be stabilizer I think ebay has all the best deals in any quantity, the more you buy the cheaper per lb it is. Ebay has been running a lot of coupons as well you can get 10 - 20% more off depending on the deal they are running (currently 15% with PSPRINGBF)