Q = How long will these keep after receipt?
A = Best to use within a few days but will be useable for up to 2 weeks - perhaps even a month - before deteriorating too much. With time, there is a depletion of the food source but also a build up of faecal products and products of metabolism. Keep either at room temperature or (preferably) in a fridge, removing a few hours before use. The culture includes flagellates as a source of food (Chilomonas, which is a flagellate protozoa). Loosen lid after receipt.
Q = How many Amoebae are included with each culture?
A = There are a few hundred Amoeba in each culture - suitable for use with up to 50 students.
Q = Can I grow Amoeba on to produce new colonies?
A = Our supplier says it is difficult to grow Amoeba cultures and does not recommend trying. From starting a new culture it can be up to 3 months before they are suitable for use, and they require the addition of a food source and changes of water to remove them from any contaminants which build up. Each culture does include a lot of Amoeba, so growing on should not be necessary and is hardly worthwhile.