I followed the instructions in this video:

http://www.youtube.com/watch?v=oa8iq8htR-s


I did have a small algae problem about...one and a half weeks ago, I think. I let the DE filter (a Hayward Perflex) go too long without a backwash (since opening the pool in early June). I noticed some algae buildup beginning to accumulate on the bottom, and then noticed a slightly green cloud come from the return line after starting the pump one day.

I backwashed the filter, and the way I do it is I let the majority of the waste run out of the filter, then I disassemble the filter and clean out the tub and the filter 'fingers' completely with a gentle hosing. So when I put it back together it's entirely fresh DE in the filter (although the main reason I do this is because it causes less of a mess than blasting the dirty DE out via the back line, which is a problem because I have poor drainage in my yard). So I did that, vacuumed and the algae was gone within a day or so, but it was very slight to begin with.

The pool is currently pristine, although some people have complained that the water makes their eyes burn slightly. I've noticed it as well, though it is very slight and I don't know if it's out of the normal range for a pool. This has caused me some concern regarding CC levels.

That all said, my brother redid the test today, after not chlorinating yesterday. He found FC levels to be 2.5ppm and no CC.