I bought 2 pieces of LR 2 days ago just for the bright peach/pink cora algea and I have changed 50% of water 2 times in the 2 days and the amm is off the chart and the nitrites are above 1. I know it must cure in the holding tank, but now the peach/pink is turning a bright green. How can I save the very few patches left. It was covered 2 days ago. The LFS did tell me he just got the rock that day, but I didn't know it would die like this. I scrubbed the rock before curing, but it didn't help. I have made sure the Cal stays up, but what else can I do? I want this to spread on my other rocks so bad! It is beautiful.