One other thing I found when I first got started...
I had live rock and my tank was all set up and cycled. Then a friend gave me a bunch of rock, just rock, not live rock, from his freshwater tank. I called my lfs
and they told me I should be able to use it since it's fish-safe. Well, I found out later that when you add dead rock, it has to get populated and go through the diatom algae process. Well, don't add too much dead rock all at once. I had another rather large diatom bloom! It corrected itself in a relatively short amount of time, but it was rather ugly during the process.
Later, I asked the lfs
about this and they said, "Yeah, you can't add a lot of it at once." THANKS GUYS for giving me ALL the information I needed BEFORE I needed it! NOT!