 Direct sunlight and an ample supply of plant food, such as lettuce, peas, or certain algae, are necessary for optimal health; in subtropical areas, they can be kept outside in unheated tanks in the summer; in temperate zones, backup heating may be necessary.This strain of molly can also be kept in saltwater reef tanks, and provide clean-up duties for the tank.To transition a molly to saltwater, adjustment time is needed; increase the salt content to match the reef tank over a period of three hours.