Actually ........... you need to have your cousin come on over and register here at Pool Forum so he can learn how to take care of his pool himself. We typically don't help with pools via a third party because we find that it works best when the pool owner is the one posting. Having him register will help him learn to manage things without you having to be the 'go-between' during the process. You can be the overseer while he is learning.

He can go ahead and start scooping out as much debris as he can and he also can go ahead and start dumping in some bleach as long as he has a way to mix it in well. (A broom, oar, submersible pump, etc.)

You're a good cousin to want to help him.