I recently got two Chinese Fire Bellied Newts that are living in a ten gallon tank together, they're both adults (about 4 inches from nose to tip of tail). The tank is mostly water but with plenty of land for them to get on (vines above the water, a piece of driftwood that sticks out of the water, plastic lily pads, etc). One of the two spends most of his time underwater, hunting blackworms and only swimming to the surface to get some air. The other seems to freak out anytime he touches water. Water temp is 72, with good water quality. The newt that stays on land will swim frantically at the water line trying to find something to grab on to. Is the land newt just a weird case or is it something I should be concerned about?