Add a few drops of Nutrafin Cycle when you first put water in your tank and right before adding any jellyfish.  This biological supplement helps a helpful colony of bacteria grow in your filter.  This bacteria digests the waste emitted by jellyfish.

Nutrafin Cycle helps reduce aquarium maintenance by helping to reduce waste in gravel, power filters, decoration and on interior aquarium surfaces. Waste control rapidly reduces organic waste from overfeeding, fish waste and other decaying material such as plant leaves. Nutrafin Cycle is especially beneficial for aquariums where greater amounts of fish waste are expected. During rapid organic waste break down ammonia levels may rise. The simultaneous use of Nutrafin Cycle biological supplement is strongly recommended to control and prevent potential increased ammonia and nitrite levels, supports optimal water quality and clean aquarium conditions.