I've always thought vivariums/paludariums were pretty interesting but I always wondered, how do you do water changes? I tried a 5 gallon paludarium once and I wasn't exactly sure how I would be able to change the water in the tank. How would one perform a weekly water change when the tank is half full of water and there isn't enough room to start a siphon using a gravel vac or a siphon?
