It sounds like "water mold" (aka "pool snot" & some other, worse, names).

As you suspect, it's been discussed before. It may surprise you that I found the most relevant threads, not by using the internal search, but by Googling. For that type of search, Google does much better than the built-in search . . . and that's true for most forums. But many people don't now how to 'localize' their search, by using the "site" operator. Here are two examples; the first one is the one I used; the second used your terms:
https://www.google.com/search?q=site%3Apoolforum.com+"water+mold"
https://www.google.com/search?q=site%3Apoolforum.com+"white+slimy"+swimmi ng+pool

Obviously, search terms matter, and knowing that that goo is often called "water mold" helps a lot.

Anyhow, here are the two most relevant threads:
http://www.poolforum.com/pf2/showthread.php/16716
http://www.poolforum.com/pf2/showthread.php/16797

I will point out that a Taylor K2006 is almost essential, in order to manage the high chlorine levels needed to clean that goo up, and you'll also need accurate CYA (stabilizer) test results, which strips cannot provide.
http://pool9.net/tk/

Finally a KEY point: if you've used ANY non-chlorine sanitizers or algaecides in your pool, you need to ID those in DETAIL, before you start following the chlorine based clean-up described. If you mix chlorine and PHMB (Baquacil) you're gonna mess up your pool spectacularly!

And, if you could do us a favor, I'd be grateful. We don't have any decent photos of pool snot -- partly because it's rather difficult to photograph. If you've got the skills, I'd LOVE to have some decent pictures of that mess.

Good luck!