So these are the steps I have for page 3:

First, page 3 of the tutorial. For the sea, I created three layers: Sea 2, Sea 1 and Sea base.

For the sea base, I selected a bluish color, filled the image, and added some noise: I set the amount to 12% just to give it a round number.
I filled the Sea 1 layer with white. For layer styles, I went to Color Overlay, left blend mode set to Normal, and selected a neutral gray [128,128,128] color. I set the opacity to 30%.
I went to Pattern Overlay, set the blend mode to Multiply, left opacity set to 100% and increased the scale to 350%. I selected a stock texture that Photoshop came with.
I went to Blending Options and set the blend mode to Multiply.
I filled the Sea 2 layer with white. For layer styles, I went to Color Overlay, left blend mode set to Overlay, and selected the same neutral gray [128,128,128] color. I left the opacity at 100%.
I went to Pattern Overlay, set the blend mode to Multiply, left opacity set to 100% and reduced the scale to 35%. I selected a lighter stock texture that Photoshop came with.
I went to Blending Options and set the blend mode to Multiply.