Building a reliable incubator is essential for cultivating bacteria in a controlled environment. A glass aquarium, a low‑heat lamp, and a dimmer switch provide an inexpensive yet effective solution for home or educational labs.
Place the aquarium on its side in a stable, temperature‑stable area where it will not be disturbed.
Insert a digital thermometer into the aquarium so the reading is visible from outside.
Mount a small, low‑heat lamp inside the tank. Route the cord through one corner, plug it into a dimmer switch, and then into a power outlet. Hobby or pet stores carry suitable lamps.
Cut a piece of heavy, heat‑resistant plastic so that it covers the open end of the aquarium, extending at least 2 inches beyond each side.
Cover the opening with the plastic, securing it with duct tape at the top and a single strip along the sides. Leave the tape removable to access the interior. Ensure the lamp is positioned far enough from the plastic to prevent melting.
Use the dimmer to adjust the lamp until the aquarium reaches the target temperature (70–95 °F, depending on the bacterial strain). Verify the reading with the thermometer before inoculating.
