On Thursday I began to model and build my first prototype.  I came up with many different ideas beofre finally designing a feasible model.  I am going to incorporate a few different elements into the product.  For starters, an atom thick sheet of graphene with microscopic holes will still be the center piece of the entire system.  The top of the filter will have a strainer to extract some of the bigger clumps of dirt, seaweed, etc.  The water will then go through the graphene, removing any salt and certain strands of bacteria.  The water then goes through the final filtering system, which will be an average clay filter thats weeds out any other live bacteria and disease.  All of the elements I just mentioned are built into a canister which is then screwed onto the top of a bucket.  Presumably, the system would stay screwed on until it needs fixing, so no bacteria would be able to get into the already clean water.  There would be a spigot at the bottom of the bucket to extract the water.  This is initial working model, and I'm sure some changes will have to be made.