Anyone buy one of these. I purchased one a while back and its not working for me. The system itself is fine but as far as getting to the aptasia its impossible. If you have them on the glass and tank its fine but all mine suck so deep into the rock I cant get to them. I tried hiiting the button before I made contact but they feel the charge and suck in imediatly. I have to try to stab them then hit the button and there so deep in the rock by then im not even making contact. Just my thoughts.Perhaps Im doing something wrong.