Bubbles and Green Water in a New Koi Pond: Patience and Peat

New Pond Syndrome

Bubbles = off-gassing from fresh liner, concrete, or bacterial bloom. Green water = free-floating algae before biofilter matures.

Stabilizing Steps

1. Add pond peat or barley straw to the filter.
2. Plant oxygenators (anacharis, hornwort) heavily.
3. Buy feeder goldfish (cheap) as test fish; keep koi out until stable.
4. No algaecides—let the ecosystem establish.

Timeline

4–8 weeks for clear water. Research "new pond syndrome" for more.