Flipper Edge Max 2 in 1 Floating Magnetic Aquarium Algae Cleaner Dragonets GFO is most commonly used

GFO is most commonly used in a media reactor like the BRS reactor or media bag

there are tiny amounts of essential trace elements such as iodine

Does it get any better than this

Once introduced into the aquarium

The draw string attaches directly to plumbing for almost any sump configuration

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