I have a few very large elephant ear plants about a foot from my holding tank, they are large, can they break or crack my tank? Thank you Jim B.
Elephant Ear Roots..
Certified GKH Gardening Expert
If they have enough room, they should not be a problem. But if they are constricted in their planting location (e.g. they don't have enough to spread) they may become a problem. I would recommend thinning them out regularly to prevent them from becoming overcrowded.
This article may help with dividing your elephant ears: