I just need to whine about this. I just changed cartos on my tank...have done this countless times, but OMG this one will NOT work. I filled the tank, dry hits...yada yada. I can get about 2 hits off of it, then it tastes dry. I dry hit again, wait. I even filled the carto with a syringe. I'm just annoyed and too stubborn to toss this one and start over.