Dude, that's awesome. And I don't care what anyone says, they ARE expensive. Almost $500 for a pump? I hope they are worth it cuz I gotz two. Cant wait until you set it up. Good luck keeping all that sand in place. That will be monster flow!
Even and $350 used it is expensive. To answer your question they are worth it
Just wish they were cheaper.
John with your shallow sand bed you'll have to get creative. I have mine mounted about 4 to 6 inches from the top in a 20 inch deep tank and it still moves my sand. They create some crazy undertow.
Very nice pics. Your tanks look very healthy! Let me know when I can go check it out.