re: Anti Slip “Cookie” in your Swimming Pool.

Unfortunately that "Sutton" brand is about the only type available to us downtrodden Aussies.

I concede that it might perform better in hardwood or a better more expensive brand would be different, however, when the cheap Bi does better for me I'll stick to them... I'm not necessarily saying don't buy TCT all I'm saying is I wont recommend them.

I can only talk about my experience. 

I will recommend a Rolls-Royce, only because I've actually driven one (about 40 years ago) and liked it.