I didn't see or hear my pistol for the first 4 days, I had basically given up hope. Then one night I was sitting here chatting and heard it snap 2 times, I thought my tank was breaking. Then again last night it did it 4 times in a row real fast. The goby just got put in last night...they found each other pretty fast! I am just glad to see the shrimp, I thought I had lost him.