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No pool available but have a close 40 degree lakeI would use 4 lb and 10 lb, but that's with a new XXL 7mm wetsuit. Much will depend on your body composition and how new your wetsuit is.
A proper weight check in confined water or a pool will tell you what you need to know. The salt-water adjustment (once you have a handle on a fresh-water number) will be to add about 4-6 lb for a body weight of 125-210 lb and average salinity.
Yup thanks.... +18lbs on suit and XDeep NX steel plate is -6.8lbs....w/Zen, SS adapter and steel plate they equal +15.6 lbs...lot to juggle but I am getting there....the 'balanced rig' calculator is golden to a point, but I had to adjust some gear weights...proof of the pudding will be tomorrow weather permitting I give my setup a buoyancy check in Wallowa Lake....after that the trimming process!FWIW, a farmer john will be more buoyant than a one-piece (the basis for my numbers). Don't forget to flood the suit, or else you'll need more lead than on a real dive. (Tip: use warm water before you even get in.)
You could ballpark it before going to the lake by finding out how much lead takes to sink the suit by itself in a large trashcan of water or hot tub. (I would guess that would take at least 18 lbs.) Subtract 5 lbs for the steel plate and try that to start.
Wow...that is a lot....thanks for the info....I will tote along extra weights to add on if needed.. hopefully since I am smaller I will need less weight....Bare XLT 7mm fullsuit and a SS Zen in fresh water with an AL80 I use 14lbs