Kent Marine FE, iron from flourite
Saw this on sale at the LFS tonight and picked some up, http://www.kentmarine.com/botanica/fe.htm
was wondering if anyone has used it or if it is basically the same as other iron supplements. I don't have an iron test kit, and hear that they are inaccurate, so I was wondering if anyone knew how much iron flourite (15lbs in 10g), puts into the water column, and for how long. are there large negative effects for fish/plants if iron is above a certain threshold?