Are you building a full kreisel or a pseudo-kreisel? The latter would be a lot less expensive. Are you planning to invest in a chiller? If so, you could go with moon jellies. Here is some info on them: (Copyright TFH 2006)
Moon Jelly Aurelia aurita Ulmaridae
Once an animal only suited for large public aquariums, advances in jellyfish husbandry have brought this species into the realm of home aquarists. Jelly aquariums have long been constructed in some Japanese aquarist’s homes and reports are filtering in that a few home aquarists in the United States also have moon jelly aquariums. While many jellies need to be housed in a “kreisel†(German for carrousel), the moon jelly can often be housed in a rectangular aquarium â€"œ as long as water currents are set up to keep the jellies suspended in the water column. Additionally, the jellies must be isolated from any filter intakes by some sort of screen and diverting water current. Figure 8 shows one possible design of a moon jelly aquarium.
Figure 8.
One design criteria common to all of these systems is that no air bubbles can be present in the water column â€"œ these bubbles will tear holes in the bells of the medusa stage.
Early aquarists working with moon jellies had only one food source available to them; HUFA enriched Artemia nauplii. This food is time consuming to produce and the enrichment products are expensive if purchased in small quantities. Recently, some advanced have been made feeding jellies with a frozen Cyclops product called Cyclop-eeze. This may reduce some of effort needed to feed these animals, but some aquariums have reported that this product will not serve as a sole diet for moon jellies. Adult moon jellies need to be kept at 62 to 65 degrees F., and only live 9 months or so. This necessitates that a breeding colony be maintained, or that new animals will need to be purchased periodically. Two additional tanks are needed to raised moon jellies; a ten gallon tank for the ephyrae and a 20 gallon aquarium to raise the strobolated larvae.
