I'm planning a paludarium for a 55 gallon tank, and so far I've decided I want a Hammers Cobalt Blue Lobster, Ghost Shrimp, and newts of some sort (in addition to some fish about 3-4 inches long). Will newts be okay in an environment like this? Should I worry about something trying to kill them, or them trying to eat anything else? I don't know a lot about newts, but I was thinking about having salamanders before someone talked me out of it for fear that they'd eat the shrimp, and suggested newts as an alternative.