One thing I noticed, too....I went out and took a look at the filters on the spa. I lifted them out. They didn't look really scummy or anything. As I went to replace the one filter, though, I noticed what was like a cakey ring underneath the filter. It was white, and felt like wet bread. I scooped out as much as I could by hand, but it was falling apart a little bit. Hoping that wasn't anything too bad.
I have ordered some Ahhh-some (along with some other testing supplies I was running low on). I will have an update once I've used the product.
With Ahhh-some, is it necessary to do a complete drain and fill? Will I use the product and then drain it after all the gunk has been broken down?