So I agree with the Bio guys, I truly believe bio is best. I think there is a bit more naturalizing that should be included in our keeping but that's for another day

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Also, I think if Bio is of interest, do it right off the bat. Why? Because bio will slightly alter some aspects of care, like how much water.
Also, and this is the BIG one. You should not turn a Chams cage Bio. You should add a Cham to a Bio Vivarium. What I mean by that is you have to remember that a Bio Viv, is a living thing. The plants are alive, the CuC is alive, the ecosystem you have created is in a way alive.
Other bugs will appear in your bio, and you'll be like how did that get there lol. It will likely go through a Mold phase, where fungus and bad bacteria will take over, for a bit and then good bacteria and CuC will win the war. This is especially true if you sterilize everything (bake the soil, Leaf litter ect). Alot of plants will go through shock, when added to the new Viv they will seemingly die off somewhat. They will be in shock, drastic environment change from their pot in a Garden center.
The point is, it is ideal to have your Bio Viv, up and running for some time before adding the Cham. Let the plants spring back, and start to grow in. Let the CuC get accustomed to their new ecosystem and get their numbers up. Let the good bacteria thrive and kill off the bad. The Cham will add more stress to this Bio, so make sure the Viv is suited to dealing with the stress.
This is also a good time for new keepers to see stuff in action. You can use this time to test water schedules (somewhat) test drainage System, see what temps and humidity is like, day to day, hour to hour. Then when it's time to add the Cham, you will know that everything is perfect.
Also, still might be a good idea to have a second enclosure for the new Cham, temporarily. You should likely Quarantine long enough to get Fecals ect done. As if you add parasites to the Bio, it all has to be scrapped.
Hope this helps

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