I have a 2007 extreme shallow 1875 xs. I pulled up the floor boards the other day because water would not drain out of the bow of the boat. The extrem shallows have floor boards from bow to stern. Anyways I stepped on the sprayed in form and water gushed up out of the foam. So I removed about 40 to 50 pounds of wet foam from my boat. This was just 1 section of foam about 30 inches long 12 inches wide and 6 inches tall. I am guessing if I were to remove all the wet foam there would be around 500 pounds of wet foam. I cleaned out the drain ports in the bottom of the boat and the water stated to drain out of the boat.I could see water running under the foam and the hull of the boat. I can see the purpose of the foam as a floatation aid and possibly as a means to reduce rock damage to the hull because the space between the bottom of the hull and the floor board is a solid foam, The foam would also reduce the amount water entering the boat in case of hull puncture. My question is this: Should I replace the the foam that I pulled out, leave the wet foam in the boat, or pull out all the wet foam I can and not replace the foam. Any other thoughts on what should be done with wet foam in a boat.