Walmart does cary Envirotex, and at about the same price as the water kit. The water kit is a typical tow part expoxy gel. It works prety well but does take a couple days to dry and is really only useful for completely still water, since I haven't found a way to make a rippled surface. The Envirotex, OTOH, doesn't require mixing, will cover more area, and you can stipple the surface as it dries to create ripples or small waves. It dries completely clear as well but seems to look "deeper" in succesive thin coats than the two part product. It dries solid within 24 hours and you can add more coats as needed. It's also easy to "freshen" up on old water feature with another thin coat.
I used what is called a gel gloss medium (Mod Podge and others are not gel, they are like a thick clear syrup), but the liquid gloss medium works well, too
I used a product like Envirotex, but you want any finish quality grade two part epoxy. You pour that in a couple of layers, maybe three, and you can tint them with a half-drop of acrylic craft paints like the ones sold in Wally's. In my case, I also added a pinch of Plaster of Paris powder to generate some turbidity. When that set and hardened, I coverd that tinted epoxy with a thin layer of gel gloss medium and turned the foam brush on its side to stipple the surface. It turned out very well!
-Crandell
