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Although the water filter in the tank will help keep the tank clean, peacock eels can be very sensitive to water quality.  Peacock eels may require more water maintenance that some other breeds of tropical fish.   Replace approximately 30% of the water in the tank each week. Peacock eels prefer very clear and clean water, so if your water become foggy change it out and consider adjusting your filtration method. Once you are sure your peacock eels are healthy and adjusting to your aquarium you can reduce feeding to multiple times per week, but feed them frequently until then.    Peacock eels need live food to survive.  Bloodworms, black worms and tubifex are excellent food sources and can be bought at most pet stores. The worms you feed your peacock eel can burrow into the substrate and establish their own colonies so your eel will have plenty to eat. Over time, peacock eels can even learn to eat right from your hand! Peacock eels don't usually require tank heaters to adjust the temperatures of the water.  Many people who live in warmer climates will find their tanks don't require any kind of heater.  Peacock eels prefer temperatures above 72 degrees Fahrenheit, so if your house stays warmer than that on average you probably won't need a tank heater. Never let the water in your tank exceed 80 degrees. Peacock eels tend to become very shy when introduced to new environments.  They will hide most of the time when first brought into a new home, but with the right variables in place they can become happy members of your aquarium's community.  Over time, peacock eels can become extremely friendly fish. If you set your tank up to make the peacock eels feel safe, they will begin emerging from their hiding places sooner.
Keep the water clean. Start by feeding your peacock eels every day. Keep the water the right temperature. Be patient.