Hi reefers, what would be an ideal way to kill a small amount of zoas and avoid Palitoxin? I have a couple of zoa gardens, sometimes a particular type becomes more prominent and starts mixing with other colors, until it overcomes the original colony. The result is a less desirable colony taking over an precious one. Due to the complex aqua scape, it isn't always possible to frag it. I've been shooting them with Aiptasia killing solutions, but I am keen to hear what other methods people use.