Who has been messing with my tank?

Hi guys.

I don't think that I need to be concerned but am slightly curious.

I have some empty shells in my tank and every now and then the hermit crabs move them around on the sand bed. Yesterday morning however, I noticed that three of the shells had been carefully moved to block up one end of a tunnel that I have going through the rock work.

I have a pair of black and white clowns, a springeri dottyback and a coral beauty fish wise as well as a pair of fire shrimp, an emerald crab, 6 hermits and 4 turbo snails.

Who is the culprit? Or could it be some mystery hitchhiker that I haven't seen yet?

Thanks in advance

Swede

 

Don't now but I will stay tuned to find out!

 

This might be another case of Amish Gang violence. Believe it or not, they're having problems in Hershey, PA. These gang members are breaking into peoples houses and unplugging stuff!

Seriously though, I know some wrasses live to move shells and rock around, but you don't list one as one of the inhabitants. I'll be staying tuned also!

 

triggers also, dunno you didnt list anything I'd think that would do that, I know I've seen my dragon goby grab snails and move them out of his way before but I'm not sure, let us know if you find out

 

Swede: my wife and I have our money on the clowns! We have a seabae that is always rearranging things.

 

This is some funny stuff now keep us posted lol.

 

Still have no idea who is to blame, but they are being very insistant on blocking this hole up.

Over the last couple of weeks I have moved the shells out of the way three times and they keep going back. A coral frag has also been moved in front of the hole now as well!

Will have to stay up one night and try to catch them in the act.

 

How big is this hole that's being plugged up?

 

Roughly 1 inch diameter.

 

Could it be simply water flow?
Just guessing...maybe pusshing through like a vacume?
Where's your power heads directed?
I also will stayed tuned....
LG