Recycling SPS?

[Reef Pilot]

Yes, I know how sand gets made in the ocean, but it is also huge, and certainly no danger of an overdose of P04. But in our small enclosed aquarium eco systems, that may not be the case. So just wondering if anyone has actually done that (adding to the sand, not a Ca reactor) with no ill effects. I think it should be OK, as everyone so far has intimated, but just asking...

And, haha, agree not the best use of my time, but could say that about a lot of my reefing activities...