I recently picked up some dry Ferrous Gluconate from Aquariumfertilizer.com to replace the Flourish Iron I've been using. The directions that came with the ferrous gluconate say to use 36.6 grams / 1 liter of water to make a 10,000 ppm solution. I was just over at their website and the directions there say to use 95 grams / 1 liter to make a 10,000 ppm solution. Any idea which is correct and how do you calculate the amount needed to make a 10,000 ppm solution?
Thanks!
Jeff
Thanks!
Jeff