self-regulating

So I work at an aquarium store and have lots of saltwater experience but I’ve never taken the plunge into reefing. At home I have a 20g salt tank with a pair of clowns, a lawnmower blenny, a cleaner goby and some inverts. That tank is well established and has been going strong for almost 3 years...

Hey guys, I really need your help. I am a mechanical engineer tasked with designing and configuring a self-regulating Saltwater Aquarium but unfortunately I know nothing about aquariums (Well, not true, ive been reading up a bit, but id still consider myself completely ignorant on the subject)...