How did hydra get in my fish tank?
In our experience, we’ve noticed that hydra often lays dormant in fish tanks for many months, but then the population blooms when you start heavily feeding baby brine shrimp. It’s possible that the hydra hitchhiked from aquarium decorations, aquatic plants, rocks, or driftwood that came from an infected tank. Hydra can also be introduced if you collect live foods, plants, or hardscape from the wild.
For more information, read our full article on How to Get Rid of Hydra in Your Aquarium.