I have been keeping a log of how often I have topped off my Joe B Tigershark tank and today was the 29th time since getting my used Shoebox F10 in the fall of 2018. Each fill is about 80 minutes so that's roughly 2,320 minutes (39 hours) of run time. I have had to replace one o-ring so far.
Man, I pray that this little guy keeps on ticking!
Man, I pray that this little guy keeps on ticking!