Lighting question.

[Jack]

What kelvin are the bulbs? This sometimes plays a role in coral colouration.

I think the reccessed poylps are just due to the really strong 400w lighting. Montipora Digitata aren't light demanding SPS corals. Also the poylps retract a bit if it's put under really stong current, in my experience.

A lot of factors play a part in coral pigmentation, every tank is different. Both corals sound healthy though.

HTH a bit.