Hi, I picked up a small piece of LR with purple Coraline on it. The two questions are 1- How tolerant are Coraline with water parameters? 2- About how long will it take to spread? These are my water parameters as of today nitrate 40, nitrite 0, cal. 425, alkalinity 300, pH, 8.4 ammonia, .25 Temp 84 deg.F, S/G 1.022 Thanks for your replies.