I have never had an issue with the sulfides after 45 yrs of Epsom salts use.. As for the Calcium depending on what you use makes the difference as to how you add it.. Most will just dribble your to death and not move anything.. Double even triple the amount you add . Tanks hit a break even point and what you added last year will not be sufficient this yr. Coralline and corals as they grow their needs are more and they consume more you have to adjust the dosages to match the demand. If you are using the liquid stuff It is not very concentrated get you some Calcium Chloride snow melt or Kent's Turbo calcium . More bang for your money. As for 600ppm LOL I have bumped mine from 900 to 2,000 ppm in a few hrs trying to ward of an algae issue this past fall. _________ Some of the world's greatest feats were accomplished by people not smart enough to know they were impossible (Doug Larson) |