The size of the pool is 6m x 25m x 1.35m depth.And we have though of going for 48mmx48mm glass mosaic tiles of different color combination. The reason is that we felt that going for a smaller tile might be too much busy on the overall looks and also too many grout lines would be seen. Wheres as the 48x48 tiles would be much relaxed in the pattern and a bit more easier to maintain. What is your take on this? Thank you in advance.

There are many options in dual charged vitrified tiles which looks like marble slabs.. May opt for it. Size 2' x 2' or 4' x4'

The hassle with square wood-look tiles is that they look too artificial. The only way to avoid that would have been to lay them with the grains alternately- vertical, horizontal- in a chessboard pattern. However, you do get tiles in 6" x 24" which you can lay in a break jointed pattern as shown here. They mimic the look of decking planks

According to the microbiologists and pathological science experts, the nano-particles available in the upper layer of the tiles gets attached to the body surface of the germs like bacteria and virus and adversely affects the chemistry of the protein based cellular mechanism of the microbe. This makes their growth and multiplication impossible and kills them.