Ball Pythons, Boas, Tegus, and Blue Tongue Skinks
Moderate to high humidity. Large inhabitants that compress soil and produce a lot of waste. Environment could contain many micro-niches for hosting a larger range of springtail/isopod biodiversity.
Go with the Straightforward Choice for a simple cleanup crew or the Advanced Ecosystem suggestions to take your bioactive ecosystem to the next level!
Straightforward Choice: Springtails
Pseudosinella violenta (Bylas Ant Springtails) - The best cleanup crew springtail for most scenarios. Very fast breeding and surface active cleaners.
Advanced Ecosystem: Springtails
Mix Pseudosinella violenta, Folsomia candida, and Entomobryoides purpurascens to step it up a level and cover more environmental niches. Optionally add even more species like Entomobrya unostrigata, Desoria trispinata, Seira dowlingi, Lepidocyrtus sp, etc. to maximize biodiversity. See the full species information list for picking additional species.
Straightforward Choice: Isopods
Porcellio dilatatus (Giant Canyon Isopods) and/or Porcellio laevis (Dairy Cows or another color morph). These are large isopods that can withstand larger reptiles. P. dilatatus burrow and aerate soil while P. laevis are the hungriest isopods available and can handle lots of waste.
Advanced Ecosystem: Isopods
Mix Armadillidium vulgare, Porcellio scaber, Porcellio dilatatus, and Porcellionides pruinosus. Porcellio laevis could outcompete some of the others so avoid them when aiming to maximize biodiversity. See the full species information list for picking additional species.
Quantity
Quantity of springtails and isopods required for a bioactive enclosures varies based on enclosure size and the amount of time the enclosure is establishing before adding the main inhabitants. As few as 100-200 springtails and 10 isopods per species could seed a 4x2x2ft enclosure if it is set up well in advance and the cleanup crew is given fish food once or twice a week to help them grow in population. For the 4x2x2 example I recommend 500-1,000 springtails and 50-100 isopods if they are needed immediately. You can get away with starting with fewer isopods or springtails in the environment and still have the main inhabitants, but it will take a while for the CuC to start performing their duties effectively.
Crucial Information
It is safe to use the protein-hungry P. laevis due to the thick scales of the reptiles. A. vulgare can eat soft live plants but plants that can survive these heavy reptiles will hold up to the isopods.
Additional Information
Always provide a thick layer of leaf litter for the cleanup crew to hide in and graze on. For a naturalistic look, I recommend adding crushed maple leaves on the floor with live oak and magnolia leaves on top. Fallen leaves make up a large part of the isopod diet and soft leaves like maple are their preference. Springtails will also graze on the maple leaves as they decay. Ideally, the soil in the enclosure should have some detritus (like compost) for an additional food source. If mixing up your own soil blend, add crushed leaves and white rot wood to the soil or purchase a high quality compost or topsoil to mix in. Detritus as it breaks down further is also food for your plants. Supplemental feeding with fish food is a great way to keep the cleanup crew population thriving and ready to tackle the main inhabitant's waste.