PoolDoc,
My husband actually opened up the filter & cleaned it all up a few weeks ago. Pressure gauge has been at about 16. Leslies is coming back out tomorrow though because there is a suction leak somewhere & they installed our new pump last week. So the filter may not be operating optimally right now.

Watermom,
I do have a Taylor kit (although not the K2006) with yellow and red drops. But is the OTO/Phenol kit different?

Also, I know I've read to pour the Borax slowly into the skimmer but the Hayward pump manual says that adding any chemicals directly into the skimmer voids the warranty. So I've been diluting it first. Is it less effective that way?