Concentration was too low for me... By Michael on 2/15/14
Michael wouldn't recommend this product to a friend
I used this along with the Red Sea Coral Colors Test Kit. This stuff did raise my iron to the right level, but in order to maintain that level I had to add 35ml of this stuff every day! I would be going through two bottles of this a month. That's ridiculous. I only have a medium stocked 150 gallon sps tank. The KZ iron supplement worked better for my needs.