I am writing to anyone that cares to opine about the efficacy of the nudibranch C. Varians as a way to control C. Retrogemma (flatworms)that are spreading like wild fire in my tank. I have a 150 reef that is littered with the little red devils. Albeit harmless they are an eyesore. Problem is that my LFS never has the nudibranch and i am forced to purchase them via internet and will be sent to me without a stay alive guarantee. I guess these die easily in transit; moreover, i hear these things die easily period and have a natural short life span of about 1 to 2 yrs. How many do you think i need to eat say 10,000 worms?...I have a six line wrasse which does nothing to control this plague.
DD
DD