Yes I tune my bowfishing bows the same way I do my hunting bows and straight arrow flight is critical in bowfishing as well. You want the arrow to hit the water as straight as possible or else it will veer or plane off course and make hitting deeper fish much more of a problem. I bare shaft tune and shoot the fish arrow without barbs in it at about 10-20ft and adjust nock pt and shaft length to get the arrow coming off the bow straight. When you attach the line it will keep it straight in flight and can straighten out some minor flight problems but you will still get the best results by tuning the arrow to the bow. Most standard fiberglass arrows with normal fish head weights of 250-275grs will spine around 50/55 or so. If you have a longer draw or shoot more bow weight you may need to cut down the shaft some to stiffern them up, but for lighter draw weights, you may need to shoot a heavier head and you can find fish pts up to 550grs or so. Good luck, take your time tuning and the results will definitely benefit you.