I didn't want to hijack the other guy's thread about foam but ours we have been battling since we got the tub pretty much in 2014. We have used the ahh-some stuff, changed the filters, refill regularly.
here's the interesting part - to me anyway. So the hub refills the tub, changes the filters, get chems right and no one uses it for like four days. Go to Use the tub and I notice there's scum all around the edge. What the heck? Also, the foam is back big time. It doesn't matter if our clothes are dirty or fresh. Tried it both ways.
Any other thoughts? We keep having to use the defoam stuff.
Our tub is 475 gallon Dynasty Symphany. Of course the spa company is useless and has been. The website even more so.