1. Next time you go on vacation, buy polyquat, lower your chlorine to 3 ppm or below, remove your cartridge filters (or put the filter on recirculate), and add a double dose of polyquat (www.poolsolutions.com/polyquat.html)
a) This is Intex specific advice.
b) Polyquat is removed, gradually, by the filter. Taking the cartridge out prevents that.
c) High chlorine breaks polyquat down.

3. But, this time, turn the SWCG off for now, AND

4. Start adding 1/2 gallon of PLAIN Walmart (or other 8.25% bleach) EACH evening.

5. Skip a dose, if the OTO chlorine level is orange or orange-ish yellow. (Yellow / red test drops, bought locally)

6. Remove the cartridges and carefully follow the cartridge cleaning guide: Cleaning-your-Cartridge-Filter-wiithout-Damaging-It!

7. After you are done, soak the cartridge in 1/2 gallon bleach + 2 1/2 gallons of water.

8. Keep treating the water with bleach for ONE WEEK after all traces of the water mold are gone.

9. Get some stabilizer in there (use dichlor?) and do NOT let your chlorine drop below Best Guess minimums for the rest of the summer (See Best Guess page link in my signature.)

10. Do NOT worry about CC levels, etc. until you've completed steps above. Most likely, CCs will no longer be an issue once you have finished.