Well, you are correct, no one has died from hose water and I have certainly let my kids at young ages play in little 3-ft diameter kiddie pools that were filled with untreated hose water. However, that water was dumped at the end of the day and the kiddie pool was always rinsed out with a mild bleach and detergent solution to destroy any pathogens. With that said, a stagnant pool of water left for 10 days without proper sanitation is no longer hose-water anymore.
As well, I believe you when you say that you are internet savvy enough to find this site. In that case, you can then read all of the links in
PoolSchool and you'll quickly learn the TFPC method of pool care for cleaning up your pool water or, if you chose to dump it and start over again, for properly starting and balancing your pool water. All of the information in PoolSchool is broken down into very informative and fairly short posts that can get you started.
The most critical item to pool care is testing your own pool water -
Test Kits Compared
This link teaches about the various methods of chlorination -
How To Chlorinate Your Pool
This link teaches how to defeat algae -
Defeating Algae
And this link gives an overview of water chemistry -
ABCs of Pool Water Chemistry
At this point, it really doesn't matter what was in your water as you apparently took care of the problem and killed it all. As soon as you clean up your pool water and follow a regular schedule of pool water maintenance, then no one should worry about what those "creatures" were because they will not come back in a properly sanitized swimming pool.
You have my apology for a harsh reply to your initial post. Obviously you were concerned enough about your families health and safety to reach out and look for information. For that you should be commended and you are most certainly NOT a "moron" and you deserve a clean and healthy swimming pool as much as the next person. I hope the information on this site can help you as much as it has helped me over the years keep my pools clean, clear, safe and fun.