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Saltwater Aquarium Guide Reef-keeping magazine
Coral Care

Coral Fragging Guide: Cutting, Mounting, and Healing Frags

How to safely frag mother colonies of zoas, LPS, and SPS for trading or sale — tools, technique, and aftercare.

Branching coral frags and a green coral colony growing on a frag rack
Photo: Robert Howie (rmhowie), CC BY-SA 2.0, via Flickr (cropped)

Fragging extends colonies, funds the hobby through trading, and is the only way to control invasive growers like Xenia. Different corals demand different techniques.

SPS

Bone cutters or coral saw. Cut at branch base, dip, glue to plug.

LPS

Coral saw only along skeletal lines between heads. Slow healing — expect 4–6 weeks.