Atlantic Oase Add. Pack Hel-X 13 Mm 20L Universal Rock Edge Rocks The internal thermostat turns the

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

clay grow/biological media

Height: 45" tall

Product Code 8851-0904 / 8851-1204 / 8851-2204 / 8851-5704 Material Glazed Terra Cotta Dimensions 21"W x 19

Atlantic Oase Add. Pack Hel-X 13 Mm 20L Universal Rock Edge Rocks The internal thermostat turns theBiological 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