Turn all lights off at night. Get an aquarium water heater or in your case 2 to keep the water kinda warm. All they need at night.
And a 150 gallon tank is to small for 2. ONE needs AT LEAST a 110 gallon tank so to would need AT LEAST a 220 gallon tank. Remember for every one inch of turtle it NEEDS at least 10 gallons of water.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.