I have a 10 gallon hospital tank. The reason it isn't cycled yet is because I was going to do a no fish cycle but was having a hard time finding ammonia without surfactants. I have two emperors on one of my tanks that I could temporarily spare but wouldn't that be too many gallons per hour for such a small tank? How do you feel about using an ammonia block? This would obviously not be my solution for the hospital tank, but just a temporary fix while my pleco is being treated.