Hydro-Logic ARCS Stage 1 Sediment Cartridge They are all natural and

They are all natural and compostable

MaxiGro encourages growth of seedlings

BPA-free material and burst

Four-pole works with #706120

Hydro-Logic ARCS Stage 1 Sediment Cartridge They are all natural and#741608 ARCS Stage 1 Replacement Poly Spun Sediment Filter reduces rust, silt, dirt, sand and sediment. Change every 5,000 gallons of product water. #741610 ARCS Stage 3 Replacement pH Neutralizing Remineralizing Cartridge to balance out and stabilize the pH. Replace every 10,000 gallons of product water. #741612 ARCS Stage 2 Replacement Heavy Metal Reduction Cartridge to remove heavy metals. Replace every 10,000 gallons of product water or as needed.