On the account that I have had no less the 8, yes 8, buyers back out on the purchase of this system let me clarify why this system couldn't keep sps.
1) The rock seemed to have lost one of its essential bacteria populations. Adding in new live rock solved the issue at the end.
2) The flow was too much with a 3600gph Reeflo Dart pump for young SPS frags.
If you look at my new 180g system, all the same rock is now in that system, and keeping SPS alive with no problems.
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