twin 80s

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scubadiver56:
double al80s one neutraly bouyent version i know i lose some of the reasons of having doubles but i just have them for extra air for cleaning boat bottoms right below the surface

I'm confused. Why would you need extra air for cleaning boats? How long does an AL80 last for you? Why not just have one tank on and leave the other on the dock?
 
i can sometimes get a 70 ft boat and it would be heavliy incrusted and i would not want to come back up it would be an annoyance
 

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