Would you believe I found the name after doing a search for "ascent rate balls?" They were called Buoyancy Balls and appeared in a San Diego diving website paying hommage to "Weird Gear."Those ascent balls (what was their name?) came in two styles. One color ascended at 60fpm in sea water and the other color was for fresh water. I never saw them anywhere except in a dive shop. Did they sell at all?
Trace