teach me about polyp extension

[gregzz4]

Kenny, when I bought my first SPS, I thought there was an issue too, but it took a couple days for them to calm down before I saw any PE
Plus, some that I have don't seem to extend much during the day as their polyps are quite short

If you'd like to check for PE, give your fish something frozen right before lights out, then watch for about a 1/2 hour after lights out
My corals close a bit when the lights turn on/off, then come back to normal, and I get crazy PE after lights out, even without a feeding

And if I overfeed during lights on, more crazy PE