Lifegard Aquatics Heater Modules Size:Triple More resistant to ozone than

More resistant to ozone than other airstones

teal and purple

Simply add the balls into the biological chamber

formulated to treat filamentous algae

Lifegard Aquatics Heater Modules Size:Triple More resistant to ozone thanShips from manufacturer, typically in 5 7 business days Lifegard Aquatics Heater Modules provide stable temperature control by reciruclating aquarium water continuously around the heater element. Accepts 1" or 3 4" diameter aquarium heater (not included). Compression coupling allows easy installation and removal of heater Removes unsightly and fragile heaters from aquarium Overflow pipe automatically vents air from chamber Clear cap to view "on"