[Peter Finke]

Of course, 7 Zwerge, you are right. Breeding Paros in 12 Liter tanks (as I do) is possible but surely not giving them a milieu they are accustomed to. But a 640 liter tank surely is just the opposite, and I doubt that there are serious problems to be solved by such a recommendation. Breeding is fully a matter of chance. But if it is an opportunity, then it might help in a special case.
I think we agree.