try bleach. but be sure to clean it our good before you fill it back up.
You can't
You can use Metal Free from Natural Chemistry32oz. for a 20000 gallon pool.
thru the filter intake side,
Is the water rusty color? Or is the rust color on the pool finish - plaster or vinyl or fiberglass?
If it is genuine 'black algae' it is very difficult to remove without emptying the pool and gouging the black algae out of the pool surface. Other algae can be removed by shocking the pool, filtering continuously and brushing walls while maintaining a good sanitizer level.
You can't
Pool brush and occasional chlorine or water changes so it doesn't grow in the first place
Usually this is a cleaning problem that concrete pools do not have. The bacteria that builds up is more aparent in vinyl pools and makes them slick. There are solutions and one is to make sure that you use the "shock" treatment for your pool. Another is to use the proper chlorine additive. The third is surprising, but effective... put some copper in the bottom of the pool. Pennies are effective and will help keep the "slime" from building up. If your pool is small enough, scrub the sides and bottom of the pool with a brush to clean the "slime" off and allow the chemicals to work.
A vacuum head that has a brush on the bottom - no wheels.
To remove sediment from a vinyl quick set pool you will need a pool vacuum. Move the vacuum very slowly as you work so that it has a chance to catch everything.
You have no choice but to replace the liner
yu lift it up
Vermiculite
Be more specific please- what about removing it? cost? difficulty? What type of pool is it? fiberglass? vinyl liner? concrete?
You can use Metal Free from Natural Chemistry32oz. for a 20000 gallon pool.
It was probably just bad luck. but as it turns out that assumption is correct the whole foundation of the pool should be able to support the vinyl.
Vacuum them to waste