onetime

You may have some especially buoyant undergarments that you could try to swap out but, in the end, you need what you need to safely and comfortably complete your dive.

Every person is different. General guidelines of body weight to amount of lead needed work generally, not specifically. My wife is <120lbs and needs at least 12 lbs when diving in just a lycra skin when we're on vacation. When her BC is completely empty and carrying 12lbs she can descend properly, anything less and she's got to go head first and kick like mad. Then as her tank pressure decreases during the dive she's got to worry about the increased buoyancy of the aluminum 80's we're typically forced to dive.

You wouldn't believe the hassles that it causes with divemasters as I explain to them that she needs 12 lbs. Often they argue and tell me I don't know what I'm talking about. On one occassion a divemaster refused to give her 12 and would only go as high as 10. I was ready to demand a refund and/or toss him off the side of the boat but my wife agreed to take the 10 and give it a try. So, for the rest of the dive I basically felt like a boy with a balloon as I had to grab one of her d-rings to keep her from slowly drifting up.

FWIW, I'm using about the same weight from OC to CCR maybe two pounds less.