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Discussion Starter · #1 ·
I’m currently using Seachem Iron and dosing 0.25ppm Fe every other day.
Regardless of that dosing one said that there is iron definitely in my plants
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my pH is high. 24h aged water taken from a tank is 7.7. After co2 dosing - before light turn on it goes down to 6.7.

I consider to switch gluconate to more effectively source of iron. Should I target a mix of EDDHA & DTPA?

In place where I leave there is not a big selection of available Fe fertilizer. Would those work?
Is it some ‘fish safe‘ indicator?

 

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You should try DTPA first. I hear EDDHA will stain your water red.
Gluc doesn't work in my water so I'm using DTPA. I don't know if those you listed are aquarium safe. Maybe you can try dry fertilizers that other members here use.
You said you don't have a big selection of iron where you live. If your pet shops there carry API products (every pet shop here does), look for Leaf Zone. It's DTPA iron and Potassium. Just check the back of the bottle first to make sure you got the new ones with DTPA. They used to use EDTA but I'm not sure when they switched.
 

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Discussion Starter · #3 ·
I tried EDDHA in one tank. They said form 0.2ppm it might tint your water. In my case with 0.1ppm it’s already bloody.

I might try with DTPA as you suggested either with dry powder or API product. By any chance you know type of iron do they have inCSM+B? Would it be effective in my pH?
 

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I believe CSM+B is EDTA. It's most effective at PH 4-6. However, many people don't seem to have problems dosing EDTA with higher PH. Just keep in mind, if you go with the API, there is also potassium in there. Their weekly dose adds 0.13 iron and 3.29ppm potassium.
That's too bad about EDDHA tinting your water, especially at 0.1. I had been thinking about trying it out.
 

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Discussion Starter · #5 · (Edited)
Actually I have way too much potassium, so adding more from API leaf product might do things even worse.

regarding colors you might take a look on that blog

in my case similarly to someon’s comments it didn’t reflect my tinting. mine 0.1ppm looked like 1ppm of an author’s photo.

Anyway my Seachem Iron bottle is almost empty, so I will switch Seachem Iron + Seachem Trace to simple CSM+B. Hopefully EDTA would be better than gluconate.
 
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