To clear cloudy pool water, you may need to use some chemicals. For any products you use, be sure to read the label directions carefully for specific instructions on how to use the product correctly and safely.
Or maybe $500 is all this guy can spend and it is between that and no bike. Anyways, op for the price of the Vinson I would personally check out Bikes Direct. They have some decent rides for the price and probably the better choices in that $600 range.
Re: The Last Real Mongoose Bikes. Raceit, I wanted but did not have a Mongoose in my teenage years. I guess that is why I still WANT that 1980 Supergoose I never had. I am a bit closer by now having my '96 Mongoose expert pro. I too like the old school better, but for now the Mid School is all this guy can afford.