I've read Pool School, I've bought a Taylor K2006 and did the Pool Math, but my outdoor spa looks like the black lagoon (funky smell and scum around the edge). When testing for FC, I had to add NUMEROUS (10+) dippers of R-0870 to get the 10ml sample to turn the faintest pink. When I added the R-0871, the FC reading came out to 0.4. When I added 5 drops of R-0003, it didn't turn pink, therefore, I couldn't get a CC reading. My other readings are: pH 7.0, TA 70, CH 280, CYA 37, temp is 104F. Would the fact that I'm using Bromine give false readings for anything? I've purchased some Ahh-some and am thinking of draining in and starting over. The last time I filled it was October 31st. There's two of us that use the spa for 45 minutes 2-3 times per week.
260 gallon, Bromine, no ozonator, well water, cartridge filter.