here's a helpful graph. Often you hear people saying they put Berghia into their tank and they believe they're gone/dead but suddenly one day, months later, their Aiptasia begin to disappear and they see tons of Berghia out of no where. Shortly there after, the Aiptasia are all gone and then the Berghia crash & perish.
If you look at this graph (Green curve), see how the population stays low until exponential growth get into large numbers. For my tank, this is happening now 3.5 months after the introduction of 9 individuals in a 27 gallon tank. This can take even longer depending on your Aiptasia density, tank size, habitat available for settlement, skimmers, predators of Berghia etc.
I do expect them to crash soon in my tank when the last Aiptasia are gone... they eat nothing else.
by way of mention, for you dooms-day-ers... humans & earth follow this same exponential growth curve. Buy these berghia before the world ends. Thanks.
