Every newbie struggles with the setup so here's how to do it right.
I admit it. I've struggled (and kicked and screamed and cussed) trying to figure out exactly how to tie on a bowfishing arrow.
Now, a word of caution here: If you aren't using a safety-slide on your bowfishing arrow, this setup won't work. And if you aren't using a safety-slide, best read all you can now. Sooner or later, you're going to lose the eyes you need to read with.
Check out the video for step-by-step instruction to tie on your bowfishing arrow the easy way.
Pay attention to the notches and the grooves in the slide. This will help you tremendously because it will guide the string in the proper direction and help you to remember the steps to getting things tied on.
Leave yourself plenty of slack. You can use a basic overhand knot to secure the string. The "trick" is that you aren't actually "tying" the arrow to the string, rather you're creating a loop that passes through slide and when the arrow is slipped through, it locks into the slide.
It sounds more complicated than it really is. But learn the steps and memorize them. On the water, you're going to break off a string eventually and knowing how to retie will keep you fishing and waste minimal time.