Granular Ferric Oxide (GFO) 1/2 LB

  • $10.99

GFO can be placed in a reactor chamber to control phosphate levels in a reef aquarium. Utilizing GFO will help control phosphates, algae growth, and enables correct coral growth. Replace when phosphate levels return. Half pound bag. Treats 50 gallons of water for approximately 1 month or more.