Human, welcome to the forum and conrats on the pool and for comming here so you can properly care for it.
As you have no cl and your pH is high, feel free to use the pucks you have (they will add some cya and help lower the pH). Take the fact that they will add cya into account when adding the liquid cya, whenever adding stabilizer shoot for a lower # than you actually want (I recommend ~30 ppm, but others here say more [40 - 60]) you can always add more if you aren't keeping the chlorine residual you want but you can only lower it by partially draining the pool - or letting the pool become a swamp. I've never used the liquid form so can't tell you how much to add - the bottle should have dosing instructions on it ie,' add 1 qt per 5000 gal to raise the cya 20ppm' doing the algebra to treat your 25000 gal shouldn't be overtaxing. If you haven't already seen it, take a look at Ben's best guess chart for cya vs. cl levels - it's stickied at the top of the 'using chlorine' section.
As you have 0 cl, I'd add 1.5 gal 6% unscented bleach to the pool and let it circulate for an hour, then add the pucks and let the kids go swimmingAs I don't know the dissolution rate for the liquid cya, I'd hold off on adding it until people were out of the pool.
You also need to raise that alk with baking soda. Also you need to test your calcium level, which brings me to your kit. The kit is ok if the reagents aren't too old or haven't been abused, however you don't know how old they are and how they've been treated (bad test chems = bad results = incorrect dosing = potential problems), if you can afford it Ben's kit is the prefered one here and, since so many poeple here use it, advice and help on using it or interpreting the results are just a couple clicks away (I'm ordering one as soon as I get back from transfering some $ to the credit card). You can get a lot of help by looking up any post by MWSMITH2 and downloading the bleach calculator he so generously made available to the forum users (it'll let you know how much of which chems to add to your pool).
I've gone on too long already so I'll end this post. If you have any ?s, feel free to ask, I or one of the other great folks here will be more than willing to help![]()
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