Aaron Harmon
Contributor
Ok, so I have 2 Apeks Black Sapphires, I just had them both serviced prior to a trip to Coz and noticed something strange. When I am at shallow depths (10 to 15 feet) one of the two makes a strange howling sound on inspiration. Also, this part could all just be in my head, but I can't seem to adjust the cracking effort. I have all the way in either direction, doesn't seem to make a difference. Any thoughts?