Can fish move rocks?

[kevfiz]

Hi I was just wondering if fish can burrow and Move rocks that could potentially crack the glass?

 

[Retired Viking]

I had African Cichilids that would push around plastic plants and small stones

 

[AquaBarb]

I suppose if you had your rocks stacked and they burrowed in a certain place that could be a possibility. If your stacking your rock in levels id use silicone to glue the pieces together to prevent land slide

 

[Colin_T]

Yes fish can dig under rocks and cause them to drop. And the bottom of glass aquariums have been broken by fish doing this.

If you have large rocks, it's a good idea to have them set up so fish can't dig under them and they can't fall. I used to use undergravel filter plates in tanks with lots of rock. The rocks sat on the plastic filter plates and we put gravel around them. We didn't necessarily use the undergravel filter to filter the water, but the plastic plates added a layer of protection in case the rocks fell. They would hit the plastic plates and not break the glass.

 

[PheonixKingZ]

My pleco constantly is moving sand and plants around to fin himself a perfect hiding place, so yes, it’s possible.

 

[Barry Tetra]

My Blackghost knifefish and pleco love to move substrate and decoration around when im not looking