` Considering that you're at the National Aquarium in Baltimore, I'm sure you have much experience with biological filtration. As you know, bio filters maintain a bacteria colony to process the Nitrates. They work well for aquaria, where the load is more stable. Also, when starting a bio filtering system, you must wait for the bacteria colony to grow, and not load the system heavily too soon. If you poison or suffocate your bacteria colony, or even shock it, you've got a big problem, right now!
` In a 300 gallon tank, even a little 60 pound E. notaeus would produce copious amounts of feces and urea quite suddenly, after feeding. I've had a great deal of experience with biological filtration with ornamental fish, and other aquatic animals, both fresh and salt. I've always thought that the long cyclic nature of the Boas feeding would not be suitable to a bio filter, such as a sand filter. Also, much of the urates and even the feces tend to stick wherever fall. You'd still be in there scrubbing. The bio filter would get its food in large doses, then long periods of low activity. Do you think a bio filter would react that quickly?
` I've always wanted to try it, though. My set up would have an easily maintained mechanical filter before the bio filter, and UV sterilization after it.
` Even with such a system, I would have my tank installed in the habitat so that it was easily removable. After many years keeping fish and herps, I believe that cleanliness is the key to successful husbandry. So, I an one of those who use newspaper, and small, easily removable soaking containers. Anacondas don't really need to swim, they just like feeling invisible under water, even an inch of it over them does the trick.
` If the budget will stand it, I will build from plywood, then have it shot with fiberglass resin and cloth with a chopper gun.
` Please keep us up to date on this project. I, for one, find it quite interesting. Is it to be a personal project, at home? I would like to know what you end up with. Rich Z.
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` Not much for esthetics, but really easy to clean. No complaints from the critters, either. I have had many visitors remark that my cages are so Spartan, and not 'jungley'. I always ask them how they like the smell, and they always ask, "What smell?"

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` Stop the world! I want to get off.