To Petri dishes:
1. Add 175 ml double distilled water, about 10 boiled wheat seeds (animal feed wheat or health food store "wheat berries"), 1/5 of one 7.5 grain standard brewer's yeast tablet and approximately 10 ml from a good clean young paramecium culture.
2. Stack the Petri dishes 3 or 4 high and store at 28.5ºC in a lighted place.
The cultures will be ready to use in 2 days and will keep for several weeks. One seed culture will start 10 new seed cultures or six 2-liter pots for baby fish feed.