Lots of chlorine, brushing and long filter run times.
To remove rust from the water in a swimming pool, shock the pool until the water is clear of everything other than the rust staining. Then run the filter, backwashing frequently until the rust is gone.
Yes you can order your required swimming pool filter via the internet. You can go to the website of your pool manufactuer to order the proper filter.
Best way is to vacuum it with a brush and attach the vac hose to the filter.
Repair the inside of the broken filter, reassemble the filter, recharge with proper amt of D E then vac up the residue.
Yes. Running the pool filter pump while swimming has no adverse effects to the swimmers.
The pool filter needs to be "back washed"
Yes. That is how the dirt is removed.
Clean the filter
Backwashing a swimming pool cleans out the sand filter. It reverses the flow to push all the trappings from the filter out.
You can not measure the pressure in a swimming pool. If you mean the pressure on the filter tank gage then you may have to backwash the filter. Talk to your local pool store for instructions as how to maintain a swimming pool and the equipment. Get some education on swimming pool maint. before you get into some real trouble. A pool is not too forgiving for someone without a basic knowledge of pools.
The best or highest rated swimming pool filter depends upon the use of the pool because a high use pool needs a higher quality filter. The most popular and therefore rated highest in the popularity sense are the Pleatco cartridges.