[Pavel Chaloupka]

Original water is best, you can take some bottle with you to the garden and bring a liter or two and exchange it partialy if you want to store the larvae for longer time in the fridge in case you see the water got poluted during storage. But I simply catch enough larvae to have enough for a week or so and store them in the original water without any problems even though it is many of them. Compared to white worms and blood worms who definitely need water changes if stored in bigger quantities, black mosquitoes larvae are very hardy from this point of view.