I went to check out the rotorua shop yesterday, and i wasnt really impressed at all, the prices where really high even for simple freshwater fish (22$ electric yellow cichlid)
They had four warm water marine tanks one with "live" coral that looked more dead than alive. the biggest tank was very dirty and not well organised at all. im not an expert at all and i don think i could do any better, but i expect a certain level of profesionalism from aquatic stores.
they did have one redeeming factor and that was that they obviously stock a decent range of marine fish. (they had a few beautifull strawberry basslets(80$)
another possitive was that i got to see the tirau store on the way down, they only had one marine tank (and another that was cold marine) but the anemone that tey have is fantastic, and the clown they had with it was very nice to. oh and they had a damsel (blue with a yellow tail) for only 40ish$.
oh and i dont like the rotorua store cause i crashed my car after visiting it