Hi, I can’t figure out why my blue/purple sponge has turned pink any ideas? I’ve moved it back up towards the light to help it as I forgot to put its shelf back up last water change. Is there anything special it needs to get its color back? All my other corals are doing great, water is good just the sponge is being picky. My water is rich in nutrients for my soft corals and I feed my seahorses 2-3 times a day. I posted a before and after pic.