Atlantic Oase Add. Pack Hel-X 13 Mm 20L Universal Rock Edge Rocks The solid state Transformer are

The solid state Transformer are fully weatherproof for worry-free outdoor installations

Makes it easy to add a waterfall or stream to rainwater harvesting systems

clay grow/biological media

The internal thermostat turns the heater on just above freezing and off as the water warms for fully automatic operation

which maximizes the biological filtration process

Atlantic Oase Add. Pack Hel-X 13 Mm 20L Universal Rock Edge Rocks The solid state Transformer areBiological filtration by colonies of beneficial bacteria remove toxic ammonia, ammonium and nitrites. Hel X Bio media has a huge ratio of protected inner surface versus exposed outer surface so the agitation caused by the turbulent water does not damage the bacterial colonies inside the media. This keeps colonies clean and active without a loss of decomposition capacity. Hel X 13 provides the perfect substrate for bacteria in ProfiClear Premium