Ah..20 permanent residence, and a few migratory. That shouldn't be a problem with bacteria and pathogen. However, just make sure to check on them from time to time as they go about their activities in the pond, with the stirring of the silt along the banks during the hotter days ahead.

Leo

* Knowledge and experience yield wisdom. Sharing wisdom expand the generations with crucial knowledge. Unshared wisdom is worth nothing more than rotting manure.