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> The better question is why use it unless you are in freezing temps > anyway... I heard of folks using alcohol or other liquids that have > lower freezing temps.. Under heavy use in sea water, the grease helps prevent corrosion from forming inside the ambient pressure chamber. This used to be a relatively big problem for me diving in the tropics until I added the SPEC to my SP Mk-10s. For me, the question is why doesn't everyone use the stuff. I once had an Oceanic regulator "bottom out" (i.e., not deliver gas) at about 320 feet. When I got back to the surface, I discovered the ambient pressure chamber was dry. The rubber diaphragm for the environmental doohicky prevented water from getting into the ambient pressure chamber, so when the diapragm bottomed out on the spring nut, the reg stopped compensating for ambient pressure increase. I later learned that the chamber was supposed to have been filled with alcohol to transmit the water pressure (it wasn't my regulator), but the alcohol had apparently evaporated off. It seems to me this would be a potential problem for any regulator that uses alcohol. At least the grease doesn't evaporate. > Spec kits are kind of nasty for warm ocean or silty diving ... How so? I have not had any problem with the Mk-10's in either environment. Aloha, Rich
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