I'm wondering, what's goin on? My Bubble coral isn't as lively and my halimeda plants are starting to die a little. I'm not sure what the cause is...is it because my nitrates are high? or is it because theres not enough calcium carbonate in the tank? I dont have a calcium test kit so im not sure if that's it. Also, my Tree sponge is turning a reddish orange and isn't growing very fast. A little help please?
