Okay I have an available 10 gallon aquarium.I used it for fresh-water fish.We’re going to clean it out and by a new filter.It’s liner is aquarium gravel with fake plants and a aerator,thermometer/heater.Also I have de-chlorinating chemicals.I’ve owned hermit crabs for 2 years now.I’m willing to make some modifications to the tank if needed.Dose anyone have any suggetions for candidates other than hermit crabs.Particularly any fully aquatic species.