Small cleanable frag shelf?

[dendro982]

Hi, need help again:
I have some sps frags in the tank with a lot of bryosis (Mg didn't help), it would be convenient to have them on cleanable frag shelf, movable for a glass cleaning (2x a week). Maybe disposable?

What I tried:
- eggcrate shelf - becomes unsightly very soon, difficult to clean;
- eggcrate shelf, zip-tied to MagFloat - the same, only easier movable;
- magnet mounts - tank is accessible from 3 sides, light touch from outside - and frags are dropped on the bottom, regularly;
- soap dishes with suction caps - disposable, but the flow is severely restricted, and not so easy movable.

I know, that the tank better to be cleaner, but it's filter-feeders tank.

Any ideas?
Thanks.