I'm starting to lay out the plumbing and realized how large (tall) the SP6 return pump is...
I had planned on including a check valve on the return line, not due to sump overflowing concerns as the sump will hold more than enough drainage, but rather a convenience to prevent the skimmer from overflowing. With the tall return pump, manifold/fuge feed and gate valve on the return, I might have to lose the check valve.
GEO 612 cleaned, refilled with Tropic Eden CR media and ~25% ZEO mag and ready for service...
The tank will at some point out-demand this small reactor and I'll have to replace it with a larger CaRx.