Start by Understanding Your Situation

At this stage, most people fall into one of two situations.

You may already have a terrarium at home and are wondering if you can turn it into a bioactive system.

Or you may be starting fresh — building a new setup around the isopods you’ve chosen.

Both are valid starting points.
But they lead to slightly different decisions.

🅰️ If You Already Have a Terrarium

An existing terrarium can sometimes be adapted into a bioactive setup.

But not all containers behave the same way.

Some may:

• retain too much moisture
• lack proper airflow
• or be designed more for display than for a living system

This means you may need to:

• adjust your expectations
• choose species that suit your current conditions
• or make small modifications to improve balance

A simple addition like springtails is often safe.
Adding isopods, however, depends on whether the environment can support them long-term.

🅱️ If You Are Starting Fresh

Starting from scratch gives you full control.

You can match:

• the species you want
• the environment they need
• and the container that supports both

This usually leads to a more stable and predictable system, especially for beginners.

Rather than adapting around limitations,
you are building with intention from the beginning.

Two Types of Bioactive Environments

Regardless of where you start, your setup will fall into one of two broad environments.

🟢 Humid Moss System

• consistently moist substrate
• dense moss and plant growth
• more enclosed, stable conditions

This type of environment supports species that prefer shelter, humidity, and organic-rich surroundings.

🟤 Semi-Humid Forest System

• more airflow and ventilation
• a mix of moist and slightly drier areas
• stronger use of bark, wood, and structure

This environment suits species that benefit from variation and do not require constant moisture.

Matching Species to Environment

🟢 Humid Moss System (MIUS Terrarium)

Isopods:

• Rubber Ducky
• Amber Duck
• Cappuccino
• Panda King
• Red Panda
• Cubaris murina
• White Shark

Springtails:

• White Springtails
• Red Gummy
• Orange Gummy

Optional Additions:

• Red Dusty Millipede
• Red Rambutan
• Red Spiky
• Red Santa Claus

🟤 Semi-Humid Forest System (Reptitank)

Isopods:

• Dairy Cow
• Powder Orange
• Powder Blue
• Zebra Isopod
• Klugii Clown
• Gestroi
• Bumble Bee
• Red Koi

Springtails:

• White Springtails
• Red Gummy
• Orange Gummy

Optional Additions:

• Red Dusty Millipede

Choosing the Right Container

Once you understand your environment, the container choice becomes clear.

🟢 MIUS Terrarium (Humid System)

• enclosed glass structure
• retains humidity effectively
• stabilises internal conditions

Best for:

• moss-heavy setups
• species that prefer consistent moisture
• more controlled environments

🟤 Reptitank (Semi-Humid System)

• glass tank with open top (mesh removed during use)
• allows airflow and ventilation
• prevents over-saturation

Best for:

• bark-based layouts
• species that prefer airflow
• setups with moisture variation

A Simple Way to Decide

If you already have a terrarium:

• observe how it behaves
• does it stay very humid, or does it dry slightly?

If you are starting new:

• choose the environment you prefer visually and practically

Then match it to the container that supports it.

Bringing It Together

At this stage, you should have:

• a chosen species
• a clear environment direction
• a container that supports both

This is where your setup begins to take shape.

Continue to Step 3

Next, we build the most important part of the system:

👉 The substrate — where the entire ecosystem lives and functions

Continue to Step 3

Understanding Substrate Systems →

You’ve completed this step in the Beginner Paths. Continue to the next guide to build your understanding further and move one step closer to creating your own thriving bioactive ecosystem.