It depends on how big the filter is. 18" or 24" If it is a 18" three 50 lb bag will do. I believe with the 24" it is 4 to 5 bags. I have a 19" and used 3 bags.
It should be on "FILTER"
The cleaning schedules varies from filter to filter, but a general guideline on any swimming pool filter is to take a reading when the filter is clean, then clean the pool filter when the pressure rises about 10 psi.
Run the filter when adding any chemical to the pool. It needs to circulate to do its job.
Adding algaecide to the pool when the filter is on should not do any harm in fact it should mix it into the water more quickly
140# of sand is required.
The filter doesn't run, the pump does. A good rule of thumb is that the pump be sized so as to turn the entire amount of water in the pool over in 8 hours.
if u have a filter
if u have a filter
You would really only have to buy a Salt Cell which you would attach on to the output of the pump going into the pool. You should already have a Filter, and Pump.
Add the aluminum sulphate to the pool. Run the filter for two hours. Wait overnight to vacuum the bottom of the pool.
Yes. Running the pool filter pump while swimming has no adverse effects to the swimmers.
If you're talking about your pool filter, it should be set to filter or run. Use the bypass or recirculate setting if you wish to circulate the water without having the water pass through the filter. Use the backwash setting to clean the filter.