How to thin them out without hurting other plants and soil?
Elephant Ears and Spider Plants
Certified GKH Gardening Expert
It will not hurt them to remove some of the bulbs, or plants. Both can be thinned out, but I would wait until they are not actively growing. If they do not have a rest period where you are, then it can be ok to do this at any time. Just dig the plants, and bulbs out as you would normally.