Ok so long story short I bought a semen tank, but didn't buy it from the local AI guy(mistake number 1). I have however had him fill my tank with liquid nitrogen, twice. I've noticed a few discrepancies as to the level I measured the tank at, where my AI guy measured the tank at, what point the people I bought the tank from said the nitrogen level should be at before needing a refill, and where my AI guy said the tank should be at for refilling. I wasn't there to talk to him when he filled it last. Anyways now I have no idea whether the semen is any good so I am wondering if there is any way to determine semen quality without sticking a bunch of straws in some cows to determine if it is good or not. Thanks for any help.