Thanks won’t be enough for such a splendid job did by Fukai. The crystal clear water quality is mind-blowing. Before I know Fukai, the water quality of my koi pond water is really bad I can hardly see any fishes at all, but now up to 1 year I can still see all the fishes in 1 look and the depth of my pond is 1.5m. They really do live up to their name, crystal clear water guaranteed. I just love it, totally.