Definitely add a few more holes and keep the water over on the cool side for now. Add a few holes then check it again. Holes should be on the sides of the tub. Mine are towards the top of the sides and have holes on all 4 sides. On the hot side do you have a thermometer on the inside? If it is only reading 70 then you have to turn up the heat on the uth so the belly temp is closer to 88-90. Use a thermostat to control the uth but also have a thermometer with a probe on the hot side to see what the temp is.