When fly fishing, aside from the type of fly, rod, species to catch, location, and other fishing gear, another factor needed with much consideration is the water where you intend to fish. Not just the type of water, regardless if its fresh or salty, the condition of the water plays a major role in the behavior of the fish.
You can tell more about different water conditions by seeking out simple fishing tips from the world wide web. Most likely, the health of the fish depends heavily on the type and condition of the water. If you are wondering why your catching rate is different from other days, dont blame it to yourself. You are not trying to scoop the fish out of the water by hand anyway so it wouldnt be appropriate to question your skill about this.
Try to focus on the water. Remember that aside from your presence, the fish, and what the fish eats, there are other components in the water which affects everything else that dwells in it. So, think of the pH balance of the water, the chemistry and the overall condition at the time which seems so difficult for you to get a catch.
Take note that the pH balance in the water is important to the fish as how air...