A good way for getting sand out of a sand filter is to get a sand venturi with this attached to the end of a garden hose you will be able to suck all of the sand out of the unit easily. Check with your pool shop as they may be able to sell, hire or lend one to you.
Nothing if its a sand filter However if sand is coming into the pool from the filter then you may have to replace one ore more laterals in the sand filter as they have worn and are letting sand through to the pool,
If you have a sand filter the laterals in it may be starting to show signs of wear these wil blow sand from the sand filter into the pool when they wear out.
Need to rephrase question.
It could damage the internal PVC of the filter and cause sand to get in your pool.
The sand filter wont make a pool green this happens a s a result of algae.
When you say sand, I take it you mean in the sand filter. Yes, normally change the sand or clean the DE filter when we change the liner since it most likely has been some time since it was changed..
If you are getting sand coming into the pool and have a sand filter you may have to replace worn laterals in the sand filter.
The sand should last for a long time in some cases years. If you see sand in your pool in probably means it is time to change or if the pool looks cloudy that could mean sand is soft (has lost sharp edges). if you take some in your hands and rub them together it should feel very coarse if not change it
No.
This is fairly easily achieved change over. All you have to do is change piping coming from the pump and to the pool to fit into the new filtration system.
Yes, it just depends on what kind of sand it is
Your filter will tell you on the side of it how much media sand to put in it.