Slime behind Niche Light

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Do this:

1. Run your filter on high 24/7, if you aren't already doing so.
Yes. 24/7 for a over a week now.

2. Purchase a local OTO/phenol red drops kit (yellow/red drops). Use it to maintain chlorine levels; you want to reach OTO 'orange' (12 - 20 ppm).
I have what I think is the OTO, when I last tested yesterday it was orangish brown

3. Also purchase 6 gallons of plain store brand 8% household bleach . . . for EACH 10,000 gallons in your pool. Begin adding 2 gallons per 10K each evening.
I was wondering adding more chlor would be necessary. I will try this tonight

4. Order a K2006 testkit (testkit page with Amazon links from my blue signature block below). Test your pool once you receive it.
I have this kit. See image. Before shocking, ph was about 7.1-7.2. Now it is low. Is this due to using the powdered bag shock?





5. After you get your OTO kit, tell us what your pH level is.
Appears to be lower than 7