I had an 18 x 48 donut style pool for the last 2 seasons and treated it according to the AquaChem instructions. Had nothing but problems!!

This year I went to the 18x48 metal pole pool (only because the donut pool was damaged in a large hail storm) and have been using the BBB method. It does not harm my pool liner at all. In fact, using the pucks resulted in too high of CYA levels which required a partial drain and refill.

I check my water morning and evening and keep my Chlorine level around 15 ppm due to my 70 CYA level. I shock at 20 ppm. With our high heat (100 degrees each day) I have found this to be effective in keeping the water clear and sanitized.

I also have a skimmer sock in my skimmer to prefilter out the bugs and other debris and rinse my filter off every 3 days or so to prolong the life. I change them out every 3 weeks or so - at $10 a filter this is cost effective and maintains my water.

However, when I have an algae bloom, they are changed much more frequently.

You can do a search for the best guess CYA chart and bleach calculator. They will help tremendously in determining how much bleach to add to your pool. ***don't dump it all in one spot, it will sink and bleach out your lining.