My tank crashed due to the recirculation pump (from the sump to the DT) failing overnight. The oxygen levels in the DT fell and all the fish died. I think most crashes happen as a result of equipment failure. Cheap equipment is more prone to failure. For instance, many opt for cheaper pumps, which fail as they have a big demand on them (running 24x7 for years at a time). Cheap heaters will get stuck on and cause overheating. Skimmers overflowing will empty out the sump, etc.. IMO, get the best equipment you can afford. After all, it is a life support system for your precious reeflife. Losing them can be a big shock too (always use a GFCI).
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180 gal tank, 50 gal sump, PM RFCa6 Ca Reactor, SWC Extreme 250 1A Cone Skimmer, Tunz Osmolator ATOF, Aquacontroller Apex, Aquaillumination Sol Super Blue 6 x 75w Units, Acros/Softies/LPS/Mushrooms/Zoos, Purple/Powder Blue/Yellow Tang/3xBlue Chromis/2xTomato Clown/Lawnmower Blenny
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