Before I forget, the avg cal level in my tank is around 440-450. My tank has good coraline growth, mushroom and polyps. I'm going to START adding some coral we'll see how it goes
My supplier tells me we should always aim for 450 or so, he said too much will cause stuff to close up instead of open, dunno how true it is. But 450 has worked nicely here
And thats not "car talk"