Depending on how long the single aiptasia has remained single, it might not be the aiptasia we’re all familiar with. There are aiptasia anemone species that, though still almost bulletproof, don’t multiply like most aiptasia. My vote is leave it for now but if thing’s suddenly spiral out of control, kalk paste will be your best friend. Honestly I wish I had a frag of the kind of aiptasia that doesn’t multiply rapidly. Aiptasia anemones really are beautiful especially when mature. Sadly there’s just isn’t a way to keep most aiptasia species from rapidly multiplying. I hope yours is the slow variety.lol not one vote for leave it? its been there for a while. weird question but where would i get a needle/syringe if i chose to kalk paste it?
Only reason i'm leaning towards kalk paste is bc thats my main additive anyway