Future Stocking

After the outbreak of camallanus worms, the population of my big tank has been somewhat reduced. According to the Community Creator it is now 36% stocked.
While I wait to add the second dose of the medication in two and a half weeks, I am thinking about what to replace the infected fish with. Depending on what I can find locally.


Tank:
107 x 45 x 45cm. Holds 188 litres of water.
Sand substrate.
Three plastic ornaments covered in java fern and one has a small variety of anubias.
Piece of mangrove root with java fern
Three pieces of redmoor wood - one has hornwort draped through it, one has Anubias hastifolia attached, the third has Bolbitis heudelotii attached.
Two pots containing Echinodorus ozelot red.
Hornwort floating on the surface.
Eheim Biopower 240 internal filter.

Water:
pH 7.5, GH 6 German deg (and KH 3 deg)

Fish:
12 x Microdevario kubotai (substituted celestial pearl danios in the CC)
5 x green neon tetras (substituted 4 larger neon tetras in the CC)
5 x ember tetras
3 x dwarf chain loaches
2 x male endlers livebearers


I don't expect the endlers to live much longer as they quite old, as are the green neons which I bought in October 2010. I don't want to get more of these fish.
I have had the loaches for 7¹/₂ years and with a life expectancy of 10 years, I don't want to add to these either.
I have quite a nice shoal of Microdevario, and they are hard to get hold of, so they will stay as a group of 12.
The ember tetras could do with being in a bigger shoal, but do I want any more?


I need fish that are happy in softish water and won't grow big enough to eat my smaller fish. And as I'll probably get more honey gouramis, something that doesn't nip fins and won't intimidate them.




Any suggestions?

I did actually have one of those once - I got it as a contaminant with something else, I forget what. It took me a while to ID it.

And it would suit my water, if I could find some.

I need to go round a few shops while I wait to add the second dose of Nematol so I'll see if any have them.