So I have about 30 pounds of live rock in my new tank (cycle finished about a week ago) and have an abundance of life in my tank from it from tunicates and sponges to TONS of feather dusters and I think an aptasia or two. I added my cleanup crew two days ago with various hermits, snails and a peppermint shrimp. Everything seems to be going swimmingly, but I noticed a couple of times today that my rock seems to be spitting. I've seen it coming from at least 2 different spots and it seems to be mostly a bit of sand and a slightly mucusy sort of substance sort of like the stuff a nassarius snail leaves behind it. It's just a little spurt that gets expelled pretty violently into the water column - not gradually drifting off the rock but being forcefully jetted out. It's isn't a lot and I've only seen it 3 times but I was just wondering if anyone could tell me what is doing it. Thanks!
