ph up

Hello, After watching this video I tried/tested sticking the outlet of an industrial vacuum cleaner into the pool and that created a lot of turbulence (literally like a volcano erupting). ph is currently sitting at 6.8 (or thereabouts, it's a bit hard to tell as test is limited at this level)...

So... I'm now helping my friend with her little pool. She has ph so low it doesn't register and 0 alkalinity. What do I raise first or how do I address this? It's a 3700 gal. pool. I put in 4 lbs of baking soda and some Borax. Was that a good thing? When I left her house it was still low...

Hi, I have a 18’ x 48” intex round pool. Here are my current results from my test strip: 250 hardness 2 free chlorine 0 cyanotic avid 40 total alkalinity 6.8 ph I bought some stabilizer that should help with the cyanoyic acid that will arrive in a few days. I’m trying to get my Ph and...