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The acid bath is fairly simple. Essentially in the off-season you intentionally drop the pH of the pool with acid. This is less harsh than an acid wash. The low pH helps create a corrosive water environment, when with brushing, will help loosen up stains. There are a few articles I read online...

The company I use tops most customers up to the following at the beginning of the summer: 2x 8kg Calcium 1x 8kg Alka+ 1x 1.4kg Stabilizer/Conditioner 4x 4L Muriatic Acid 1x 18kg Granular Shock (65% cal-hypo) 1x 8kg Maxi-Pucks For spa as well: 2x 4L Liquid...

Re: Blasting limescale off my pool walls - DONE & REPORT POS I've heard of some people raising the water level of their pool or spa above the stain height, and bringing the pH down to 7.2, then after brushing it seems to do the trick. Also, I've heard of people diluting muriatic acid in a...

Are the stains all throughout the pool or along the waterline? Also, how old is the pool? I know that a lot of new pools (not sure about pebbletek) have an excess amount of plaster dust that settles throughout the pool and stains. Perhaps the "acid bath & brush strategy" might work...

Does anyone know how much Muriatic Acid it takes to balance the addition of 1 bag of salt? For example: 8000 gallon pool: Salt at 0: Planning to add 5 bags to bring it up to 3000. Last year the maintenance company added the salt and it took just over a month for them to bring the pH down to...