Joes Juice should work out just fine. If you are trying to kill some aiptasia that are greater than 1" in diameter, then they may shrivel up and not completely die yet. One adult aiptasia can produce about 50 offspring per day. If you are killing off smaller ones then here is a snipet from a post I did about Joe's Juice:
Some tips for ya on your next injection:
- Hold the syringe with the tip always pointed up. This helps when moving slowly from victim to victim.
- When you do your first injection for the day, the syringe will leak a little juice immediately after placing it in the tank (prolly due to temp variations; ambient air temp --> tank temp). Place the syringe in the tank and over a spot where there is no life. This way it can drip wherever it wants until ready for use. The leakage will stop on it's own in about 5-8 seconds.
- Move slowly. There is no hurry while injecting those little buggers. You don't want this stuff free floating all over the place. Although it is reef safe. Go s-l-o-w-l-y.
- Hold the tip of the syringe about a half inch above the mouth of the aiptasia. You don't wanna touch the aiptasia directly, it may close up. Squeeze slowly and try to get the sandy looking granules to fall into it's mouth. Once you get lined up right on target, give a little harder push on the syringe. Not like you are turkey basting the rock, but just enough to give him a good feeding of Joe's Juice. If fed correctly, the aiptasia will swallow it up and sink into it's hole. There is no need to keep piling it on him or his hole. This only wastes Joe's Juice. The Aiptasia is now dead.
- Only fill the syringe with what you will need for this killing. If there is any leftover juice, do not place it back in the jar. Use as much as you can. Once the syringe gets in the tank, the saltwater might leech into the syringe. If you place any remaining juice back into the jar, it will become thinner and not as fun to use(learned from experience and further research on the NET).
Those were just my observations with Joe's Juice and Aiptasia in a 29gal reef.
I did this twice a week until they were all gone!