But but but doesn't a lot of that advice go against what the "experts" tell us Paul? Don't you know you are playing Russian roulette and you can't trust those Russians espnwith animals. Your tank like mine is doomed, its a ticking time bomb even if it has a very long fuse. Little you say makes any sense to the "experts" therefore your advice is dangerous and can't possibly be true or proven to work. Shame on you for you know not what you do ;>)A few things actually. I run a reverse undergravel filter with gravel, no sand. After the tank gets established, never quarantine if you want long lasting, healthy fish and feed food with living bacteria like live worms, clams etc along with maybe LRS frozen food. No dry foods at all.
Give the fish plenty of "real" hiding places where the fish can't see you and you can't see them. Not just a couple of large caves. I am talking caverns.
Good Luck
On a positive note I bought another black leopard wrasse on Saturday to go with my long established one not seen it since Saturday, it will be under the sand for a few days before putting in an appearance as if by magic. The black Leopard wrasse isn't so common here just available now abd again and of course more expensive.
In truth am not a big wrasse fan but like this one.