Swiss Tropicals Introduces German Breeding Rings
03 Aug, 2017

Small (4-inch) and Large (6-inch) German Breeding Rings, a new style of aquarium fish egg and fry incubator from Swiss Tropicals.
via Swiss Tropicals
Swiss Tropicals is proud to introduce a new tool for aquarium-fish breeders: German Breeding Rings. Called Aufzuchtringe by the German pleco breeders who developed the invention, they are floating, egg-hatching, and fry-rearing incubators with an integrated mini-jetlifter that continuously supplies the round holding chamber with fresh water.

This side view of the large German Breeding Ring clearly shows the round floating incubation chamber, with the integrated jetlifter rising up to the chamber with a small foam block covering the intake below. An air feed is attached to the small gray barb on the white lifter tube; flow could be adjusted with an inline needle valve or gang valve (not included).
Intended to raise small batches of almost any type of fry, the rings have a bottom covered with a 30-micron nylon gauze. That means you can feed fry with Artemia nauplia (baby brine shrimp), rotifers, or copepods without flushing the live food out.
Because GBRs float on the surface of a bigger tank, they can be used in the spawning aquarium so that water quality remains much more stable and the larvae or fry do not disperse over a large area, which would make them difficult to feed adequately.
Saltwater Applications?
Usage in marine breeding and husbandry is open to experimentation. The eggs of gramma and dottyback species need to be gently tumbled if being hatched artificially, but whether or not these devices would prove effective is unknown. Swiss Tropicals would love to hear about any new applications of the rings discovered by hobbyists.

An overhead view of the large and small German Breeding Rings, showing the 30-micron mesh at the bottom of the chamber.
See the German Breeder Rings on the Swiss Tropicals website at: http://www.swisstropicals.com/filtration-shop/better-fishkeeping-supplies/