You don't. Usually, lanthanum sulfate is used - hardly a household chemical - any metal salt that contains lanthanum, calcium, or aluminum is supposed to do it, but I wouldn't put most of those into my pool. Stick with the chemicals that work.
Note that you don't really need to bring your phosphate levels down unless you have an active algae problem, or often have algae problems.
It is not sensible to mix bleach and chlorine, or any other cleaners, especially as the question appears to be about a swimming pool? It has been known that, potentially, the gas given off, when chemicals are haphazardly mixed can cause death! Always read the labels and use household cleaners and swimming pool chemicals - carefully.
You shouold not use household products to replace pool chemicals. There are many unique properties of pool chemicals that you should be aware of
add a PH reducer chemical
Swimming pool chemicals should be locked away in a storage bin or shed where children cannot gain access to them. Be sure to prevent any dangerous accidents by keeping the children away from the chemicals.
Most commonly Phsphate removing chemicals are Lanthanum Chloride which kills any Phosphates in the water. This does take about 3 days of normal filtration to do its job.
no it is not but if you have an accident don't worry, there are chemicals in the pool water to deal with such accidents.
The main cost will be in keeping the water safe for swimming. This is done with chemicals and by have the pool cleaned. So, the cost of chemicals, electricity to run the filter system, and a pool service to keep the pool clean if one does not do it themselves will be the main costs.
As a swimming pool tech in Oklahoma, phosphate readings at 200 or above helps algae grow.
Crystal Clear with perfectly balanced chemicals.
That would depend on how much chemicals you have in your pool.
Parts per million
Swimming in chemically imbalanced swimming pool can give harm into your health. You need to keep in mind that every pool must have clean water, free from algae, dirt and sediments. There are may tips that you can get online on how to properly balance your swimming pool chemicals.