Thanks. Really some algae growth would be desired. Overall I'd want it as natural as possible, but if it got out of hand it'd just be a matter a taking a brush to it. I'm not really sure about the seams. others have done it without problems though so I don't think it'll be a problemdleomd;3199256;3199256 said:Wow that really does look great. You should post step-by-step instructions once you get your final product. Have some questions: It looks like a potential nightmare if algae sets in....difficult to clean. Also, I wonder how the added weight will affect the pressure on those rear seams? Thanks