I always ran submersible filters for my paludariums. If you design the tank well, you can easily access them for maintenance. One thing to keep in mind when building and sticking a Palu is to calculate your usable water volume. Most palus have a small area which can get crowded and overload the biofilter fast. This was a Mantella paludariums that I ran for over 3 years, and I never did a water change, and all hardware was self contained. It’s all how you plan it.
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