Sorry I didn't answer sooner. Got distracted dealing with an inappropriate response. It's probably moot, but I'll go ahead and answers so if anyone else reads this thread, they will benefit.

Filling with tabs in a bucket would be fine. You might want to make sure your hose's end isn't in direct contact with the tabs. And, you'll STILL need to make sure that there's enough chlorine - the tabs will help, but probably won't be enough. So, you'll need to pour bleach into the pool.

BUT, do NOT pour the bleach directly on the tabs. If you do, bad things *will* happen.