Welcome to TONMO, the premier cephalopod interest community, and birthplace of #WorldOctopusDay and #CephalopodAwarenessDays. Founded in 2000, we are a large community of experts, hobbyists and enthusiasts, some of whom come together when we host our biennial conference. To join in on the fun, sign up. You can also become a Supporter for just $50/year to remove all ads and enjoy other perks. Follow us on Twitter for more cephy goodness.
Joe's Juice is widely available in reefkeeping stores/circles. About 10 bucks USD for a small bottle. Used to use it all the time myself in my reeftank until we picked up a fish (copperbanded butterfly) that is an anemone/aiptasia predator. Although I've no experience with octopii--I'm just here researching and contemplating the possibility--I doubt you'd want a CBB fish in an octopus tank, though! Very expensive snack for the octy...
i Have heard of many people using calcium paste but most people who try plain boiling water agree that it is about the same - i personally went a bit over the top - took the rock out of water , got a lighter and burnt it - looking back it wasnt very humane and i feel kinda bad... the reason i did that was cos they kept retracting into their holes when i got close...hmmmm
but hey no anemones left (except my nice big rosebud!)