My frag trough idea. Need feedback.

[JDigital]

Pros
I wouldnt need to clean the 50gal anymore!
Even more room for frags.
Less plumbing and wires.
More floor space without the 50gal.
I'm unemployed and need something to do.

Cons
I'd lose a little bit of system volume.
All frags would have to be viewed top down.
Egg crate is a PITA to keep clean.
No more place to grow macro algae.
Initial expense.

To me the pro's outweigh the cons... top down viewing would be awesome as long as you got a decent Coral Viewer box. You already mentioned your macro is growing too slow to really matter.

Go for it!