The viv looks really nice Cesar. Most of the pum breeding setups that Iíve seen have one or more large water holding broms though. The brom on the bottom right, which appears to be the largest, is smaller than what Iíve seen in other pum setups. Iím no expert though. Perhaps, if the one on the bottom holds enough water, your pums will be able to raise their tads.
Instead of keeping more species, why not do more with the species you keep?