yep. used a diatetic needle....inserted it directly through the mouth (or close proximity) and injected it until I could see the lemon juice through the membrane of the body (it turns white in water). The aptasia will want to pull back but you have to stay with it. In larger aptasia cases, I've had to dose it up to 3 times to get a complete kill. You can inject it anywhere as long as you inject it. Joe's Juice says you just need to get it to the tentacles and that relies on the aptasia injesting it. I've not had great luck with this method. So far, lemon juice has worked best for me...JMO.