Oh oh … that are no good news … I never would have thought about that that could be possible … I never saw fry near the swimming plants …. I had to have a look what Salvinia natans look like, and they are exactly my own swimming plant species…..
Are you really sure? If you would take leaves from one tank to the other which law on the ground, it would be obvious.
What could we do? I’m so glad, that I have now some good adapted plants in my tanks … Should we give the plants a kind of quarantine in water (divided in “species” they come from?