So it seams that the Opae in tanks 2 and 3 have caught the “breeding like rats” syndrome that odin's lot have been afflicted with for a while now.
My jumbo Opae in tank 3 and the second offspring tank are on the verge of a population explosion. Tank 3 has, at last count 6 berried females. The offspring tank, as of 1am this morning, has it's first berried female. The small jar is holding 10 Opae that were babies not that long ago and are ready for a transfer to the offspring tank.
I was in the process of upgrading the offspring tank from a small 15cm cube to a 1.5 gallon biscotti jar (found them for a very good price).
The amount of distilled water I can produce limits me a bit. Plus when I go away for a while, I move the tanks to a different part of the house, where it's more suited for the Opae, when they'll be alone. So the tanks need to be easy to move.
It's an interesting situation to be in.
In tank 3 I have the import generation with some offspring, but in the offspring tank I have first generation offspring (from the import generation, possibly wild caught), with 1 female thats berried with second generation offspring - I think they'd be called F2.
Might be an interesting experiment, to separate the F2 offspring and keep them in a tank (1.5 gallon biscotti jar) by themselves and see how they develop (over the next 20 years). Only concern would be the limited genetics in that situation.
when in doubt, change it out... Using fresh mixed water...