Originally Posted by
natclanwy
http:///forum/post/2774370
I'm glad you haven't had a serious outbreak but I think you need to check your research as aiptasia are not Dependant on nutrients in your tank they have Zooxanthellae in their tissue and are quite capable of living and propagating aggressively without the addition of nutrients.
True indeed. Because it contains Xooxanthellae (a single celled dinoflagellate algae) it CAN multiply and proliferate without high nutrients however what it can do and what is TYPICAL are two different things. Fact is trying to irraticate one or two that arent proliferating or spreading will likely do more to cause them to spread than leaving them alone. It only takes a SINGLE cell for it to regenerate so any failed attempt or measure to stress or kill them can make matters worse (like you did, extended periods of darkness causes them to lacerate and release basal cells to multiply where they wouldn't otherwise go into panic mode). from personal experience more times than not injecting them less than perfectly with whatever only ends with a new (or the same one) coming right back to the same spot anywhere from a few hours to a few weeks later and an additional one or two for the troubles of messing with it (you basically have to inject a paste with the pumps off thats going to stay put for a while and down into the hole the foot is planted). A perfectly HAPPY unstressed atapsia in a low nutrient system does not have any trigger or stressor to tell it it needs to regenerate. Take the same situation and add nutrients the dino algae inside does what dino does.
bergia.website(probably forbidden link) pretty much sums it up as you have: "In sexual reproduction, oocyte sizes and gonad weights as well as asexual basal lacerations increase with more light and more feedings or nutrients. However the reef keeper should not assume that nutrient poor water and reduced fish feedings will slow the process any because aiptasia contain xooxanthellae".
from bob fenners FAQ: "In nutrient scrubbed tanks Aiptasia do not reproduce at all...literally. Many aquarists will have a rock say with 3 Aiptasia on it and then 2 years later... maybe have four. Most aquarists (myself included) can be too generous at times or have fish that feed messily that allow the Aiptasia to flourish"
from fishlore's aitapsia page: "Aiptasia is a smaller anemone that can get to be about 1 inch (3 cm) in diameter, sometimes larger, and reproduces rapidly in a saltwater aquarium with abundant nutrients."