I got a float tube for the holidays and finally took it out today. It is a Creek Company float tube. It has dual bladders and a foam seat. After reading all the directions, I was afraid to inflate it too much. Evidently, I did not inflate it enough. The cordura covering on the tube took on water and the bladders deflated a little. I went in after a couple of hours. I had a blast, but would like to figure out why I took on water. I think it was because I didn't inflate the bladders enough. I had to unzip the cordura covering and empty out the water. It was really heavy. Any thoughts about what I did wrong? Thanks for your input.