Ferrite Tutorials Ferrite Mix Selection Ferrite Cross Reference Ferrite Toroid Tech Specs Ferrite Chatter Noise RF Toroid Calculator by VK3CPU Aquarium Heater/Pump RFI Kits Store / Aquarium Heater/Pump RFI Kits Aquarium AC Filter for Heater, Water/Oxygen Pump RFI Aquarium AC Filter for Heater, Water/Oxygen Pump RFI SKU AACF-1.4 $12.95 Buy Now Tutorials