If you're worried about having more you might want to try a biological solution to it like getting some peppermint shrimp and maybe a copperband butterfly fish.
Copper bands are a bit touchy and while beautiful, shouldn't be bought to fight aiptasia, there isn't a guarantee they will eat it, or that they will eat anything.They are also quite more pricey, while you can get like 4 peppermints for like 25 bucks, there alot more hardy and will be nice cleanup additions in the end.
in my limited experience, without a natural solution (ie. a few peppermint shrimp) you will constantly be juicing, kalking, etc. Even then, odds are there are more hiding in places you can't see.
i futzed around with joes and other solutions till i just put a few peppermint shrimp in, and they took care of it.
have same problem,someone gave me rock covered in alagae and apatasia.put it all in a qt tank and didnt feed it and left lights off.first week shrimp would nt touch it second wee kof nof ood almost all gone including large ones, but it has noother food in the qt