Rhino Hobby Carbon Filter Size:4" (100mm) / 300mm Key additives: Chelated calcium (amino

Key additives: Chelated calcium (amino acid complex and nitrate forms)

Measurement range: 5% to 40% moisture

Does exactly what an extraction system should do — silent

Running a heater and a fan or cooler off separate manual switches means you're constantly babysitting the room temperature yourself

you may need to add calcium supplementation — growers report occasional issues here

Rhino Hobby Carbon Filter Size:4" (100mm) / 300mm Key additives: Chelated calcium (aminoRhino Hobby Carbon Filter Rhino are the worlds leading hydroponics air filter manufacturer. Rhino Hobby carbon filters are made with the same virgin Australian carbon as the premium Rhino Pro range: RC412, but they have a shorter lifespan. Rhino Hobby carbon filters feature a swappable bottom and duct coupler and they should be turned around every 8 12 weeks to even out the wear ensuring the filters last for their full 9 12 months expected lifespan.