What is the best way to keep sand fleas alive?

To keep sand fleas alive, provide a suitable environment that mimics their natural habitat, such as a moist, sandy substrate. Maintain a temperature range of 70-80°F (21-27°C) and ensure they have access to fresh seawater for hydration. Regularly feed them a diet of organic matter, such as decomposing plant material or small bits of fish. Additionally, ensure proper ventilation to prevent overcrowding and maintain water quality.