[helene schoubye]

I also keep small boraras in some of my parotanks, – mostly boraras maculatus, – and I had in one instance a terrible outbreak of something which maybe resembles what you describe. The boraras was infected with lots of small cysts, – I actually thought it was ‘ick’, – and I remember it came after a change in temperature as well.
It was a small tank, – in fact I had one paro in it and 3 boraras. I didnt medicate at all, mostly because I had no idea how to treat tiny fish like boraras, – I have not a lot of faith in medication for so tiny fishes, and I was worried about affecting the paro with medication.
So I didnt treat, – and I did loose the boraras, – but the paro was totally unaffected even the outbreak was very bad. The paro survived and lived long after and it didnt affect any other tanks later.
It was not of course ideal not to treat, but this is the only time I have had any experience of this kind involving both paros and boraras. Normally I do not see this kind of sickness with any of the species.
The paros can get odinium, this happens now and again, – but other sicknesses, – it seems very rare.