Have a inground pool with attached spa.
The DE filter had a problem for a while and blew DE into the spa, and then into the pool, where it served as a nice coating all over the pebbletech.
So, fixed the filter, and no longer have DE blowing into the spa, but have a lot of white DE on the floor of the spa that's refusing to be brushed up.
Also, have a ring of suntan+makeup around the waterline of the spa. the spa is all pebbletech - no tiles.
So, what's the best way to clean the floor and ring around the spa?