Thanks. Yes on the CYA test the dot was gone well before the 100 mark. Since they are still not home from work I went ahead and added 9 gallons of bleach that I went and picked up. So until I can get those results do you suggest dilution at all? It needs vacuuming so they can waste vac some water and we can add some fresh if you think that will help.

So far the water is clear green but you can see a little build up on the surface.

Challenge accepted!