Aptasia!

[Scythanith]

I tried to inject them with aiptasia juice for the longest time and then finally got some peppermint shrimp. I had to wait until the fish were out of the tank since the peppermint shrimp would preferentially eat the fish food, not the aiptasia. Once I left them in a 40g full of LR and aiptasia for a month they cleaned it right up.