Winter can bring unique challenges to jellyfish care, but a little extra attention can keep them thriving. First, maintain stable water temperatures, as most jellies prefer 60–74°F. If your tank is in a cooler area, consider using a reliable aquarium heater with a thermostat to avoid sudden drops in temperature. Likewise, avoid placing the tank near windows or drafty areas to prevent rapid temperature fluctuations. Metabolisms tend to slow down in cooler months, so keep an eye on their feeding habits and adjust as necessary—less food might be better if they’re eating more slowly. To ensure they’re still getting adequate nutrition, observe how much food is consumed during each feeding and remove uneaten portions to maintain water quality.
It’s also a great time to inspect your tank’s filtration system, as increased use of heating devices can impact water quality. Regularly check and clean filters, and monitor ammonia and nitrate levels, as jellyfish are particularly sensitive to changes in water chemistry. Ensure water flow in the tank remains gentle and consistent, as moon jellies rely on the current to move and feed. Lastly, pay close attention to the lighting schedule in your tank—shorter daylight hours in winter might disrupt their natural rhythm, so aim for consistent, moderate lighting to keep them comfortable. With proper care, your jellies will glide through winter gracefully!
