My fat cucumber - working hard. Has been with me for 2 years since my previous tank. Keeps the sand white and shiny. My black sea cuke is really hardy, 1 year ago, this guy almost got torn into half when he climbed into my Tunze Stream, now he's as good as new.
In-sump H&S skimmer. Sump takes up almost whole of bottom cabinet. Return is via a single MD40 tee-off to chiller and return. Elbows are minimized to maximize return flow. That's it for equipment - the only other equipment is calcium reactor.