ive had multiple biocubes for the last 3 years or so, not one issue. never had a ballast out, pump out, or anything. ONE of my biocubes had some ridiculously dim leds for some reason. i spent like 15 bucks on a single 1 watt led and its the brightest of all my cube nows. the only biocube ive ever heard of splitting or cracking was on this site, but it was drilled and running a sump; the back glass cracked.