This is a screenshot of the "3 Pool edge random brown" shader. Change the four colours in the ColorRamp and the Mortar_Color and Mortar_Thickness in the Tile node as you wish. 

And here's a screenshot of the "4 Pool tiles random blue" shader. It's exactly the same, but with different colours in the ColorRamp and a different tile size - the 40 which the big red arrow is pointing at. Change the four colours in the ColorRamp and the Mortar_Color and Mortar_Thickness in the Tile node as before, but you can also change the tile size, although make sure it's a multiple of 4 otherwise the tiles on the sides of the pool will be misaligned. 

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The 3Dcheapskate* occasionally posts sensible stuff. Usually by accident. And it usually uses Poser 11, with units set to inches. Except when it's using Poser 6 or PP2014, or when its units are set to PNU or something else.
*soon only to be available in two flavours -  DAZ and Renderosity