"One way to get the most bang for your buck out of iron, is to foliar spray it.", I'm using 6% IRON EDDHA how much would you recommend per gallon for a foliar spray? How often can it be used?

How can you monitor your fish when the iron makes the water so dark red you can't even see them until they come up to feed? Once I get my iron level up to 2 - 3 ppm does it still benefits my plants to continue with the foliar spray? At that point would it work to spray them using just the water from your FT?

Thanks again for your help, I'm just now learning about adding iron to my system. I've been using mostly rain water for my AP, it has ZERO iron. My plants are loving the added iron...not sure about my fish since I can't really see them anymore.