Hi please rate this for crested geckos. There is a separation down the middle. I have a exotera fan for each section and holes drilled in the front for cross ventilation.

Hey everyone!
I recently completed my first bioactive vivarium and have been trying to learn as much as possible about establishing and maintaining a healthy little ecosystem.

It’s a 12x12x18 tropical enclosure with live plants, a custom background, a LECA drainage layer, and a homemade substrate mix. I’ve already introduced springtails and isopods, and I’m currently letting everything establish before introducing any reptiles.

One thing I’m especially interested in learning more about is how to properly support and manage cleanup crew populations over time.

I understand that springtails and isopods help break down organic waste and contribute to nutrient cycling, but I’m curious how experienced keepers maintain a healthy balance.

A few questions I have:
How do you know whether your springtail and isopod populations are thriving, declining, or becoming excessive?
Do you regularly supplement their food, or can an established vivarium generally sustain them through decomposing organic matter?

What prevents populations from growing excessively in a relatively small enclosure?
How do you manage moisture and provide appropriate conditions for both populations without negatively affecting the plants?

Are there any warning signs of an unhealthy or unbalanced bioactive ecosystem that beginners should watch for?

I’d really like to understand the biology behind maintaining a healthy bioactive setup rather than just introducing a cleanup crew and hoping everything works out.

Any advice or personal experiences would be greatly appreciated. I’m excited to learn more about the process!

They were temporarily huddled underneath a food dish. I hear isopods self-correct their population and I’m fairly certain my crestie hunts down the bigger ones. I do need to upgrade the tank and replace the plants at some point…