New Hot Tub Owner having

[waterbear 85]

Slimy surface is usually bacterial and will not always product CC. From all the stuff the purges have removed I suspect that the spa was stores for a long time without being drained. You might want to consider nuking it with bleach. This means adding enough bleach to get your FC up to about 50 ppm (36 oz of 6% laundry bleach for a 350 gallon tub), leaving the spa uncovered, and circulating the water until the chlorine level drops below 10 ppm. Turn the heater down or off and don' use the spa until the chlorine level is below 10 ppm. You won't be able to test this level of chlorine with either FAS-DPD or with DPD, both will bleach out. You need an OTO test (K-1000). The OTO will be orange to red/brown at this high a chlorine level. Once it gives you a yellow color, even a deep yellow, the chlorine should be low enough to switch to FAS-DPD testing.

[dayday1 0]

I have already nuked it once but I only left it in there for two hours while running the pumps as many times as I could over that two hours. I am just going to keep doing Ah-some until no more **** comes out. However long that takes. Definitely a pain in the butt. 

[waterbear 85]

8 minutes ago, dayday1 said:

have already nuked it once but I only left it in there for two hours while running the pumps as many times as I could over that two hours.

Then you haven't nuked it.