dolphin has a hard time going to the bottom

by Roger Branch
(Wichita Falls TX)

My dolphin is having a hard time submerging, when i finally hold it under and i guess its fills up with water, it is fine. and does it have BBs or ball bearings in it? ive found alot of them at the bottom of the pool and i think they came from the dolphin.
ADMIN REPLY: Yes, there are ballbearing bearings for the drive tracks. You must remove the side plate to see them. Is possible the weight loss is prventing submersion