bcd with a slow leak

Question
Hello. I am a novice diver. I inherited a used SeaQuest BCD recently.  Of course, I want to make sure it is safe to dive.  I orally inflated it, hung it up and overnight, it was about half full in the morning.  I checked the dump valves, and inflator hose on the left shoulder, and they all seemed to be in place.  I didn't hear any escaping air.  I filled bathtub with water, with it full of air, and couldn't see bubbles, yet it is still losing air.  I priced brand new BCDs and I would hate to have to buy a new one.  Any suggestions?

Answer
Congratulations on buying your own gear Nick.  Divers who own their gear tend to become lifelong divers.  Typically a slow leak on a BC is a result of sand or dirt being lodged in the mechanism or seals of the exhaust ports.  A bladder puncture is possible but less likely.  BC's should be serviced each year along with regulators.  If you take your BC to a reputable dive shop with service facilities they will be able to find the cause of the leak.  It is a good idea when purchasing used gear to have it immediately serviced.  They will replace any worn out components and have your BC ready to go for a nominal fee.  Have fun diving, Jesse