My params are the same with rc as they were with io. I think it was something else because besides salt I havent changed anything. calcium has always been high around 560 and doesnt wanna go below 500. Alk is always 12, mg is always above 1600. Wc 25g a week I dont know what it is but im just glad things are in track now. Ive got frags that are a year old that are just starting to grow about a week after using rc.