I have heard horror tales of WS EZ water cracking or turning more yellow.
I have used Envirotex (2-equal part epoxy) that doesn't smell, Casting resin (two-part, resin and hardener) that does smell, and WS "new" water (pourable "resin"?). If you have a deep area to cover, use one of the casting plastics -- they can cover deeply without waiting forever -- the casting resin is supposed to stay clear longer, but my Enviortex, now some 15 years old, is still quite clear (like I can tell with the "murk-y" bottom beneath it). The new WS "water" is quite clear, but it takes forever to dry if it's too deep. It has the added advantage that, after it's "set", it is still pretty flexible -- in one area on my module, I had to peel the water away and re-do it -- and I could.
Remember to prepare the lake bottom first, dark in the center feathering out to your dirt color at the edges. Add any debris (actual dirt, sticks, stones, etc.) to the bottom. Before you pour any "water" over such details, make sure to seal it all (I didn't on my last "water" and ended up with tiny bubbles on the bottom, sneaking out from under the "details"). I think a coat of Gloss Medium before the "water" would help avoid the bubbles, or a few coats of clear paint (like Krylon clear gloss).
Just jump in an have fun -- worst case you'll have to do it again -- and just think how much more you'll know for the second try...