Hi Bill,
do you think about catfish for having something like a cleaning team in the tank?
I think it is already clear that we don’t speak about breeding tanks, but about the tank for our adult offspring.
In two of my tanks of those kind (for my P. linkei) I have now since quite some time caridina parvidentata. This species is known for being very reproductive and being very tolerant to the water conditions.
I have learned that they seem to need some time to acclimate themselves but then they even reproduce themselves in tanks with 5 pH and EC of about 30.
I think they can be useful to clean the rests of brine shrimps not eaten by the Paros and to be living food themselves when still young.