Looks like a Bullfrog A7 or A7L. Having a hard time deciding

[Smack528i]

I too am using the Spa Frog Chlorine version.  It's been in since day one.  I feel like I'm 90% there, will get it zeroed in by weeks end.  The Tub is GREAT...  I notice chlorine once I apply is near 3 then is gone within the next day.