Thanks, Byron. Yes, we can find the platies another home. Our current tank is lightly planted and the plan is for the larger tank to be same, with gravel as the substrate and a good amount of hidey hole type decorations. I prefer easy keepers and schooling fish...so right now I'm thinking about increasing the number of neons and cories even more, and adding a good number of pencilfish or rasboras. I do like many of the barbs - do you have any recommendations that would work with what I am currently planning (cherry barbs?)?
I would get sand for the substrate, not gravel. Cories are better over sand, as it allows them to burrow into it and sift it through their gills for food, something gravel makes impossible. I have play sand in all my 8 tanks now, and only wish I had gone to it much sooner. Play sand is inexpensive, natural, safe, good for plants and all substrate-level fish...easy.
On the barbs, I would say no, given what else you intend. All barbs are active, which makes sedate fish nervous, and some can get rather feisty. Now, the cherry barb is probably the least active/feisty of barbs, but even so I would find more suitable fish from among the characins (tetras, pencilfish) that will be as lovely and even more so.
With your soft water you have an enormous range of options among South American species, many of which may well be wild caught. Pencilfish are a favourite of mine...
Nannostomus marginatus, N. mortenthaleri, N. rubrocaudatus, N. eques (swims at an oblique angle),
N. espei and
N. digramus are a few of the very peaceful species (some others are fin nippers or a bit feisty with certain surface fish).
N. mortenthaleri is a true gem, the Coral Red Pencilfish, more colourful than the very similar
N. rubrocaudatus. Either of these in a group of 10-15, and you could also include a similarly-sized group of the very closely related
N. marginatus.
N. eques is interesting for its swimming posture.
I would also get some chunks of bogwood; all these fish like this present, and it does add organics to the water than are health aids. The dark brown Malaysian Driftwood is ideal because it it heavy and sinks immediately, is not bad for tannins, and comes in varying shapes being all natural. Some has crevices and tunnels that cories love to check out.
Byron.