Steam distilled water is just distilled water that you can get pretty much anywhere. If your water is getting less green and more blue, then you are killing algae. Keep up the bleach and also post some numbers when you test. Run the filter as much as you can. It is what will get the dead algae out of the pool. As far as getting in the pool, it is fine to do so. People swim in lakes and ponds all the time and they have algae in them. I would take a shower as soon as you get out and I hope you don't freeze! Brrr!