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Mine is doing great with a large bioload, though it hasn't been up very long (about 8 months).
90 Gal mixed reef, sps, lps, softies, shrooms, 20G sump.
Ehiem 1250 return, Seio 1500 for flow.
DIY recirc skimmer pulling about 1/4 cup nice dark skimmate daily.
About 1 gal Cheato in the sump. (would like more but don't have room)
1 quart Remote DSB in the sump.
150lb liverock (estimated)
Yellow Tang
Convict Tang
Green Chromis
Coral Beauty Angel
Half Black Angel
Peach Skunk Clownfish
Engineer Goby
Diadema Pseudochromis
2x Banner (Bangai) Cardinal
6 Line Wrasse
Pistol Shrimp
Peppermint Shrimp
misc snails and a few hermits.
As for maintenance, 3 gal waterchange every week. Once per month, I blow what detritus that does collect (and it is a fair ammount) around with a MJ1200 before my waterchange. Then I either drain my 3 gal with the suspended clowd, or I run a canister filter for a few hours depending on my mood and the time I have. I also prune the cheato once a month.
So far so good, params are good.
As with any reef, I think success depends on how much care you give it. I like the idea of a rubble bottom because it's easy to suspend ditritus and siphon it off, I also am never going to have to worry about a DSB crash. My thought was to change out my RDSB in the sump once a year. (it's in a rubbermaid container, so I can just pull it out, take out a cup of sand to reseed the new bed, throw the rest away.
-J
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