My local dive store only charges $40 for a hydro. Since they dont have the equipment to do it, they send the cylinder to the local welding supply company that charges a whoping $15 for to do the hydro. Do I support my local dive store or my local welding supply company?
Also, If I remember correctly, when I learned to dive the only time a visual had to be done is when the cylinder was completly drained of air.
Also, If I remember correctly, when I learned to dive the only time a visual had to be done is when the cylinder was completly drained of air.