i am building a pond for my bowfin it will be 8ft long by 4 ft wide by 3 foot deep it will have a wood frame and an edpm liner. is there a way to place a veiwing window in the pond i can build that side anyway that will work but i am not sure how to seal the liner to the glass or lexan any help would be great i could experiment but i can't deal with a flood in my apartment.