I have a used once marine master Bluetooth with extra cleaner, alk, nirtrite, and mag. SOLD
I also have stand alone phosphate nitrite ulr testers $30 easy shipped
Selling my Hanna Marine Master set. I bought it thinking I would use it more than my separate checkers but I was wrong for some reason I enjoy using my separate checkers force of habit I guess. I used it a total of three times using reagents from my separate checkers so none of the reagents in...