How do you grow medical leeches indoor?

To grow medical leeches indoors, start by creating a controlled aquatic environment with clean, dechlorinated water at a temperature of 18-20°C (64-68°F). Use a container such as a large aquarium with sufficient aeration and filtration to maintain water quality. Provide a suitable substrate, like gravel or sand, and include hiding spots like PVC pipes or aquatic plants. Feed the leeches with blood meal or small amounts of fish, ensuring that the water remains clean and well-oxygenated for optimal health and growth.