Aiptasia Outbreak Alert: Act Now Before It Takes Over Your Reef Tank

If you have noticed small brown or translucent anemones popping up on your rock overnight, do not wait a week to deal with it. Aiptasia doubles fast once established, and one overlooked frag can seed an entire display within a month. This is a live alert for anyone currently staring down a pest outbreak reef tank situation.

Why this matters right now

Aiptasia reproduces by splitting and by pedal laceration, meaning a single polyp disturbed by a clumsy scraper or powerhead can become five polyps by the weekend. They sting neighbouring coral tissue, steal food meant for your SPS and LPS, and colonise rock crevices where fish cannot reach them. The longer they sit, the harder they are to remove without damaging surrounding coral.

Callout: what to do in the next 24 hours

• Isolate any new frags or rock in a quarantine container before they touch your main system.
• Treat visible polyps directly with a targeted injection gel, not a broad chemical dose.
• Check every crevice with a torch, aiptasia hide in holes and behind rockwork joins.
• Consider adding peppermint shrimp for ongoing grazing pressure once chemical treatment has knocked numbers down.
• Re-inspect in 72 hours. Missed polyps regrow from tiny remnants.

Treatment gear that actually works

For direct injection on individual polyps, Aiptasia X from Gallery Aquatica is a reef safe treatment at 30 AUD that most Brisbane reefers already keep in their cabinet. Red Sea's Aiptasia-X 60ml at 35 AUD works on the same principle and is handy if you are already running Red Sea dosing products. For larger outbreaks across bigger rock structures, the 500ml bottle is worth stepping up to.

Salifert Aiptasia Exit at 22 AUD is another solid option if you prefer a gel that sets on contact, and it is cheap enough to keep two on hand for a bad outbreak. Two Little Fishies' Julian's Thing tool pairs well with any of these treatments, letting you get the injection tip right into tight rock pockets without disturbing coral nearby.

Before you add anything new

Every new coral or rock addition should get a coral dip before joining the main tank. This is the single most common way aiptasia enters a system in the first place. A quick dip and a torch inspection under magnification catches hitchhikers before they become next month's emergency. If your rockwork is heavily porous, swapping in cleaner substrate like MarinePure media during a rebuild can also reduce hiding spots.

For advanced or whole-system infestations, ITC Reef Delete is a serious option, though at 599 AUD it is generally reserved for severe, tank-wide cases rather than a handful of visible polyps.

Prices mentioned in this article are accurate at the time of publishing and are subject to change. Please check each product page for the current price before purchasing.