Prevention Mindset
Treat every new coral as a potential introduction vector. That does not mean panic—it means consistent inspection.
Prevention costs less time than eradicating flatworms or nudibranchs after they spread across a display.
Visual Inspection
Use a magnifying glass or phone macro lens on plugs, mouths, and crevices in the rock base.
Look for egg masses, flatworm movement, nudibranchs, and unexpected snails—not every spot is a pest, so avoid overclaiming diagnosis.
Quarantine and Observation
A separate observation tank is ideal when available. Shorter observation in a frag rack zone is better than direct-to-display placement.
Frag racks should be easy to move but stable enough that corals are not knocked into pumps during inspection.
Dipping as One Layer
Dipping can reduce external pests when done correctly. It is one part of a process alongside inspection and isolation time.
See our how to dip new corals guide for temperature matching and rinse workflow.
Frag Plugs and Racks as Inspection Tools
Mounted frags on clean plugs are easier to inspect than colonies encrusted across rockwork.
Magnetic racks let you lift corals to eye level without disturbing entire aquascapes.
Ongoing Maintenance Habits
Dip scissors and frag tools between colonies when propagating multiple tanks.
Avoid sharing water between systems without a reason—cross-tank transfers spread pests quickly.
Common mistakes
- Placing new corals directly on main rockwork without observation
- Diagnosing every spot as a specific pest without confirmation
- Relying on dipping alone after skipping visual inspection
- Propagating across tanks with unsterilized tools
This guide is for general reefkeeping education. Always follow the label and safety instructions on any product you use.