I also heard about that trick and decided to try it with one of my captive aquarium crappies. Instead of using a ballon I used a small length of one of those long round swimming pool floats. I cut a small 2" long by 2" diameter piece of yellow foam off the float (pool fun noodles they call them) and tired some 4lb test trilene fishing line to the noodle. I attached a fly line to leader needle like device to the other end of the fishing line. ( I have used these needle like with barbs devices to push up into the end of my fly line. The barbs hold the needle inside the end of the fly line. One end of the needle devise is sharp and the other end has the metal looped to make an eyelet to tie the fly line leaders to. Most fly fishermen use a nail knot to attach the leader to the end of the fly line but needle like device lets you use a trilene or any other regular knot. Anyway I stuck the needle (about 1" long) into the back of the crappie behind the dorsal fin in the back muscle. I figured that would not hurt the crappie and would eventually fall out or pull out and the small wound would heal. I marked the crappie's anal fin just in case I ever do catch him again when fishing after he got loose from the fun noodle. I used about 20ft of 4lb test trilene XL line.
I let the crappie loose at the boat ramp and watched him swim out away from the shoreline. I had placed some PVC crappie trees out in the water that winter and was interested to see if he would hang out by my PVC trees. He went straight for one of my PVC Pipe Trees and stayed there for about 5 minutes or so and then started swimming back into shore. He came back to the shoreline on the left side of the boat ramp( as you are looking out towards the water while standing on the concrete ramp) and got the line caught up in the submergent vegetation and then the fun noodle never moved again. I suspect that he got the line caught on something and then pull the needle out of his back as two days later I was able to reach the fun noodle from the shoreline with a long pole and retrieve the fun noodle. I didn't recover the other end of the fishing line with the needle attached. The line was hung up on something and I broke the line.
I should try this again now that you mention it. I should try this in another spot and use less line next time. 10ft may work better. Most of the crappie suspend out away from drop off on this lake that I fish and I should let the next one go where there is less obstacles for the line to get hung up on.
Those fun noodles are not very expensive and I used a couple of them to make marker bouys for my boat. I ran a big nail or two into the fun noodle to weight one side of the round noodle. That way when the line spins off the noodle it will stop rolling when the weight hits the bottom. That keeps the marker in the right spot. I added about 25 to 30ft of line to the fun noodles and then tired on a 2oz fishing weigth to the other end of the line. when you wrap the line around the fun noodle section (6" long section) it will unroll off the noodle as the lead weight drops down to the lake bottom. You can add more line to them if you fish in deeper water lakes. I may have used 50ft but can't remember exactly how much line I used. I used a type of twine and didn't use fishing line for these. I have about 20 of these made up now and they can be lost without loosing a lot of money. I normally use the manufactured type floats that cost about 10bucks for two of them. These maufactured type floats are flat and horseshoe shaped and flip over when teh weights falls down. They use a heavier steel type weight that can be stored inside a indentation of the plastic float. These also stack up on each other and snap the plastic floats snap together. I have some other old plastic floats that I used to use as well. I use these floats to mark drop off along river channels or creek channels to help me visulize the lay of the land under the water. Once I mark a spot by going over the spot several times in the boat watching the depth finder I can usually remember exactly the lay of the land and fish it better the next time I go. The next time out I may only use 1 marker and fish around it . I have used 10 to 15 markers at times to figure out exactly the way a creek channel is going.
Today I am using digital maps and a GPS unit to do the same thing. I still use a floating marker bouy from time to time though to mark the drop off.
Originally Posted by crappieseeker