Totally Agree, Leave a jar of water int he window to go very green and feed to them to top the food.
although this winter can't see ny in the tanks.
will have to start new cultures once it gets warmer.
i have a tub in the yard wich i seeded about two year a go and every summer it comes
back even more it was seeded with two bags from the local shop and come march the tub
starts to come alive