However, my problem is that they have recently stopped basking. They used to bask in the basking light that we have provided them. We have 2 lights a basking light that gets up to 86 degrees and a sunlight lamp that is just on over the tank. We recently got a water heater that keeps the water at 84 degrees. they love the water and love to play in the filters 'waterfall' but over the past week and a half they have stopped basking and their shells are getting very soft. we just put a calcium block in the water so they get the calicum they need. they are also fed bloodworms, baby shrimp and krill and turtle pellets but i am concerned with the softness of their shells.
Should i make them bask in the sunlight? or do i need to find a way to raise the air temp? or are they being perfectly normal turtles?
Thanks for your help!

