Materials for water and glass

Question

I am trying to simulate light reflection, refraction, etc. in the aquarium, and I need water material and glass material.

In fact, I do not use water and phong material for glass, because at the moment I have not found the best, here you can see a test demo: http://ledohm.free.fr/test_webgl/

For water, I do not need to simulate waves, which means that I can use the same material as glass, but with different values ​​for opacity, reflection and refractive index.

I found this example that seems to perfectly simulate glass, but I don’t understand how to adapt the material to my needs. From what I understood, refraction is computed from envMap, but I have no texture. I just want a glass wall that simulates reflection / refraction / ... as much as possible in reality. How can I create (or find) such material?

Change 1:

green: total internal reflection of water

red: reflection of glass

1: refraction by water
2: refraction by water + glass
3 and 4: lost

Edit 2:

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