Throw a submersible pump in it and drain it to wherever you think is appropriate. These pumps are available from tool hire places at quite a reasonable rental.
The only way to remove Hardness is to partially drain and refill your pool.
The salt in a saline pool will help you float, so it probably is easier to swim in.
If this a newly built pool then have the company that built the pool ~ or the plasterer ~come back out and finish their job of prepping the pool before the start up. Whatever it takes to clear the main drain of the cement is their job and they have shirked their responsibility. If they say they have to drain the pool this then that will be at their expense. There should be no charge for this task and they should also pay for the water to refill the pool. k
The only way to lower your cya level in your swimming pool is to partially drain your pool and fill with fresh water that will lower it or if you want to lower it to almost nothing completely drain your pool and start over but keep in mind chlorine tablets will raise your CYA level More information in the related link below.
Yes
He should pay to have the pool emptied, cleaned and refilled with the saline. That is what he is responsible for if he made the mistake. The owner could take him to court over it and win.
If you have a saline purification system on the pool, the tiny bubbles are the hydrogen by-product of the saline process. If the pool is not saline, bubbles must be coming from an air leak pool probably located on the suction side of the pump (leaf trap lid, for example).
No. Just don't drain on other people's lawns.
Where is the drain located? If it is on the wall near the top then you can keep the water in the pool. If it is near the bottom then you may have to drain the pool.
Drain the water. You have messed with the pool structure causing the walls to bow from the weight of the water. You can lightly mark the liner where you want it to be and the drain the water set your rails back and then fill the pool up.
Yes you can. Start with 1/4 the normal amount that a salt pool would use.
Vacuum the pool. If you have to drain it, only drain it half way. Floating pools are a disaster.