Catching Paros is an exhausting thing:
1. They live not in the free water, but in the riparian grasses.
2. Use very strong sieves and catching instruments only; everything else is useless.
3. You must work in the vegetation; this is heavy work.
4. They do not live near the surface but in greater depth than 20 inches.
5. You have to change waters very often; store enough water for that purpose.
6. The best time in the year is two or three months after the breeding season.
7. This means: November is not the best period; high waters are generally bad.
8. Restrict your search to blackwater habitats only; use measurement kits for water parameters.
9. You must obey the laws.
Many people have told that in the wild they never saw a Paro. This does not necessarily mean that there were none. It means that those people expected to catch them like Rasboras or Trichogaster. One has to know something about their behaviour in order to be successful.