What Do Isopods Eat? A Complete Feeding Guide

One of the most common questions new keepers ask is simple: what do isopods actually eat? In the wild, isopods are detritivores, meaning they feed primarily on decaying organic matter.

This natural diet makes them extremely useful in terrariums and bioactive enclosures because they help recycle waste and break down organic material.

If you are new to the hobby, you may also want to read our guide on how to start an isopod colony before building your first enclosure.

The Core Diet of Isopods

The most important part of an isopod diet is material that mimics their natural habitat. These foods should always be present in the enclosure.

• Leaf litter
• Decaying hardwood
• Organic substrate

Leaf litter is particularly important because it acts as both food and shelter. A healthy enclosure should always contain a generous layer of dried leaves.

You can find many of these materials in our isopod supplies collection.

Supplemental Foods

While leaf litter forms the foundation of their diet, isopods benefit from occasional supplemental foods. These should be offered in small amounts and removed if uneaten.

• Fish flakes
• Shrimp pellets
• Specialised isopod diets
• Vegetables such as carrot, courgette, or cucumber

Protein sources such as fish flakes or shrimp pellets can help support colony growth, especially when isopods are reproducing.

Calcium Sources

Isopods require calcium to build and maintain their exoskeletons. Without adequate calcium, colonies can experience moulting problems.

Common calcium sources include:

• Limestone
• Cuttlebone
• Crushed eggshells

These materials should remain available inside the enclosure at all times.

Foods to Avoid

While isopods are excellent recyclers, some foods should be avoided.

• Heavily processed foods
• Salty foods
• Foods treated with pesticides

Always wash vegetables before offering them to your colony.

How Often Should You Feed Isopods?

In most enclosures, the majority of the colony’s diet comes from leaf litter and decaying wood already present in the habitat.

Supplemental foods can usually be offered once or twice per week in small amounts.

Overfeeding is one of the most common beginner mistakes, as excess food can encourage mould growth and disrupt the enclosure ecosystem.

Choosing the Right Species

Different species have slightly different feeding habits, but most follow the same basic dietary principles.

If you are just starting out, beginner-friendly species such as Zebra Isopods or Cubaris Murina adapt well to standard feeding routines.

You can browse our full range of live isopods to find species suited to your enclosure.

Building a Healthy Feeding Routine

A balanced feeding routine is the key to maintaining a thriving colony. By providing plenty of leaf litter, occasional supplemental foods, and a constant calcium source, most isopod colonies will grow and reproduce successfully.

If you are setting up your first enclosure, a purpose-built vented isopod enclosure can help maintain the stable environment that healthy colonies need.