No, you shouldn’t be able to taste the salt at all since saltwater pools only contain about 10% of the salt you’d find in ocean water. Saltwater pools do create some chlorine, though, so you should still try not to drink the water.

There are some companies that offer acid washes that do not require pool draining. However, the process can take several days and requires a bit more elbow grease to scrub the pool surface compared to draining it entirely. Since your pool surface and age are both a factor, work with a professional to choose the best method.

The disadvantages of container pools come down to flexibility and customization. Shipping containers come in standard sizes, so the sizes and shapes are limited. They also have a very distinctive look, which may not suit the aesthetic of your backyard. 

Beyond that, while container pools are more affordable than in-ground pools, certain models can be more expensive. This includes the cost to heat your pool, since the metal walls have more heat transfer than other types of pools (which some brands circumvent with insulation).

An aboveground pool should be level within 1 inch—and it starts to become unsafe after a couple of inches. Any slope will lead to an uneven distribution of water, which will put pressure on your pool’s structure, wearing down the pool liner. In certain cases, it could cause your pool to collapse. Even if you’re within a safe window, you may still notice that the water level is uneven.