Rhino beetle larvae grow plump! Highly nutritious fermented substrate [100L] Recommended for egg-laying too!

# Click here for our Rhinoceros Beetle and Stag Beetle listings on Mercari!

Himalayan Oyster Mushroom Spawn Fermented Beetle Substrate - Specially formulated for growing large Japanese rhinoceros beetle larvae, packed with nutrients.

(18 images available in the photo section)

(Comes in a durable, resealable bag that prevents tearing, allowing for long-term storage even if you have leftover substrate)

If you have a specific liter amount in mind, please message us through the questions section, and we will do our best to accommodate your request.

We can combine up to 120 liters per box.

This is a premium fermented substrate made from 100% oak sawdust, which has been found to be most effective for rhinoceros beetles through years of research, using the highest quality Himalayan Oyster Mushroom spawn.

We've added several types of special amino acids and bacterial agents that promote the growth of Japanese rhinoceros beetle larvae.

By incorporating bacteria, the symbiotic microorganisms within the digestive tract that break down cellulose into protein sources become more active, improving nutrient absorption.

Feeding this from the early larval stages leads to larger adult beetles.

Experiments have shown that larvae raised on this premium fermented substrate, rich in symbiotic microorganisms like internal bacteria, grow significantly larger than those raised on commercially available substrates.

We crush new spawn made from oak sawdust and carefully undergo a triple fermentation process for an extended period in a controlled indoor environment.
(We do not use waste spawn discarded by mushroom farms, unlike cheaper substrates from other companies.)

This is our ultimate, meticulously crafted substrate, developed over a long time and at a high cost.

Most common fermented substrates from other companies use waste spawn from mushroom farms as their raw material, resulting in reduced nutritional value.

Furthermore, inexpensive substrates fermented outdoors often contain mixed insects and fly eggs, leading to infestations during rearing.

Our Fermented Substrate is carefully fermented indoors using only new spawn, ensuring a 100% absence of mixed insects, so you won't have any infestations during rearing!

We've had numerous Guinness-sized beetles emerge, and thankfully, our repeat customer rate is over 90%, making this a popular substrate.

The Himalayan oyster mushroom spawn, which rhinoceros beetles and stag beetles prefer the most, is expensive and difficult to obtain.

Himalayan Oyster Mushroom Fermented Substrate is recommended as food for Japanese rhinoceros beetle larvae and as a substrate for egg-laying.

We have numerous records of Japanese rhinoceros beetles reaching 88mm.

There is a record of a single female Japanese rhinoceros beetle laying 90 eggs.