The trick is to avoid introducing harmful critters, like Hydra and Cyclops in the first place.
I once kept pure cultures. like Paramecia, but that was a PITA. Now I just get infusoria from healthy tanks by transferring a bit of Java moss and inoculating it with a drop of Liquifry No 1. I visually check for Hydra when I do it.
Hydra are pretty easy to see, and I got rid of them with an old-fashioned three-step formaldehyde process. New dewormers are supposedly much better and safer. My method kills all the infusoria.
Wright
01 760 872-3995
805 Valley West Circle
Bishop, CA 93514 USA
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