They can be fitted to the end of all pipes that lead to the tank and all tank overflow outlets and keep pests out of the tank whilst allowing the tank water to breathe.
Mozzie Stoppa™ Screens incorporate a 0.955mm stainless steel screen moulded into a 90mm and 100mm Male & Female PVC fitting. They are a versatile solution to insect proof the tank because they can adapt to fit to PVC pipes and adaptors leading to the tank and to all tank overflow outlets.