Mystery bucket of chemical - what is it?

[Simmons99]

If you don't know what it is - I would dispose of it instead of risking damage to the pool.

[ScottS]

If you don't know what it is - I would dispose of it instead of risking damage to the pool.

I agree with this. Besides causing damage to your pool you introduce the risk of damaging YOURSELF!

You can never be too careful with the chemicals, they are NO joke. And if you don't know what it is the chemical already has the upper hand. Don't let it get the best of you!