I’ve just added 14 giant river prawns, Macrobrachium rosenbergii, to the sump tank of our aquaponics system. At this point they are anything but giants measuring only about 1/2 inch in length.
With a little reconfiguration the sump may serve as a decent refugium. The main grow bed just got a new larger LED light with the smaller light being moved to the sump tank. All water is returned to the right side of the center baffle with the left side acting as calm water for floating plants and settlement.
Note: The water hyacinth are free floating plants but I had to add the foam life vests so they would remain upright until they grow out a little more.
The new grow light is being run at partial power and has been mounted close to the ceiling. The elephant ear, taro plants need the additional space and light. The banana, musa is also well adapted to life in a soilless system.