If you can drain and refill for $60, that would be MUCH easier and better.

BUT! (And this is a great BIG "but")

BUT, many pools can NOT be safely drained without professional help, and often can not be drained even then.

+ In ground liner pools can NEVER be strained without special prep, and usually, professional help.
+ On-ground liners can sometimes be drained, but sometimes they collapse. If the liner is old, it will often tear, rather than stretching back into place.
+ If there is the smallest amount of water in the excavation of an fiberglass pool, it will float out of the ground!
+ If the ground is WET, even a concrete pool will float!

And . . . all of those outcomes will cost you way more than $200 in bleach! So, be careful.