My plants are turning a bit yellow. I wanted to add some chelated iron. Could not find any in the stores. All I found was this:
Would this be safe to use in an aquaponic system?
Hum, I've never used such a product in my system. I'm not sure that you really want to be adding gypsum to your system through as I don't seem much benefit in the soil amendment being added to a gravel/water system.
I have in a pinch when I couldn't find any chelated iron, used the Liquid Iron which is Iron Sulfate or Ferrous Sulfate I think. Truth is, if your system pH is a bit high, the Iron sulfate will only be minimally effective because it gets quickly locked up by the high pH. You might be better off using the Liquid Iron mixed up as a foliar feed for your plants so they will get more benefit from it. Just be careful when spraying it as it often stains.
Or you might see if you can find Maxicrop plus Iron to use for your system.
What is your pH?
You can order chelated iron online here http://www.greenleafaquariums.com/aquarium-fertilizer.html
Last time I checked my pH a few days ago it was 8.3, I'll check it again today
Thanks for link Rich.
ok thanks, my system is fairly young, almost 1 month old. Last time I tested
nitrite .15 ppm
I just did a new test,
Am 0 ppm
Nitrite .25 ppm (not 25)
Also from my first readings my nitrates were higher. My first reading they were at like 8ppm on may 8th
Sorry, my wires were crossed I thought I was still in a conversation about fishless cycling. Duh, this was about Iron.
Anyway, How many fish you have?
Your Iron issue will probably go away if your pH drops down closer to 7. What is your source water? You might help yourself out if you can adjust the pH of your top up water instead of trying to bring the pH down in the system directly.
I have 1 comet goldy
approx. 15 guppies
approx 16 gal growbed
approx 18 gal water
I treat my tap water with a chloramine and chlorine remover for aquariums. Its non toxic