swings

What Corals do you have in your tank that are the first to indicate your parameters are getting out of whack. For my it's my mystic sunset monti. As soon as phosphates start to rise or things get off a little it starts to retract polyps and the color starts to fade.

Hi All, I`ve been in the hobby a while now. I have had good success with Softies and LPS but when it comes to SPS I just dont seem to be able to hit the sweet spot. Tank is a DD Reef-Pro 900 (290 Litres total system), I have a Radion XR15 (Blue) at 100% on the AB+ Setting, 10% water change every...