my LFS seems extremly knowledgable on reefing and has been doing it for a long time, but some times he says things that contridict other things i have read. my main concern right now is that he says i should keep my nitrates higher than 20ppm and less than 60, where some people on here are saying as low as 5. i have 14 snails, 1 small fish and 1 coral in my 40 gallon tank. the tank is almost done with diatoms as it is almost consistantly clear the entire time the light is on. i have not done a single water change yet as my nitrates have not spiked. so i guess im just asking for a couple of opinions.