Have a friend who's got a really large tank and he's a complete newbie to reefing... Currently, he's paying a worker from one of the fish stores to maintain his tank. He's got a major problem with diatoms and nuisance algae growth. I told him it needs to be tested for phosphates and nitrates. He said the worker only tests for salt and doesn't know how to fix the problem. Doesn't sound like the guy knows what he's doing. Anyone know of a good tank maintenance guy that's good with water chemistry?