I think the Joes Juice & Aptasia X work well. I know Mr X says Kalk
paste works well but I've not tried it. I never had much success with the lemon juice either. I've also been lucky & have had good success with peppermint shrimps. I've found that having a group of them works better than just one or two. I've had a couple Aptasia in a hard to reach area in my overflows and only ever seen two in my current DT in almost 2 years & the shrimps keep my tank free of them even though they are in the overflow.