I only use bleach dilluted with water in a 5 gallon bucket when I add any chemical I dillute it first. And I would add it to the center of the pool but I would need a row boat or a funnel and hose set up(which I might do)but that's going to be a pain in the butt unless I don't use the bucket and water and pour it from the jug. I have another question anybody use the stabilzer puck's(made in china)? Are they any good and what CYA level do you get? Mine are 1 puck per 5000 gallons but it doesn't say what level it will bring it to. Thank's for all your help guy's