Seachem iron test - no reading

[Delapool]

I understand that high kh can cause iron uptake problems, but I wouldn't imagine a small increase would do that.

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No, I'm really stumped. It's soft water to start with so it only changes to slightly less soft. Say 3 to 4 dkh. Doing a pwc does the same change really. I'll see if I have photos at all of it.

 

[Delapool]

So all in all do you think the test kit is working for you now?

I still get barely a trace dosing one cap full daily of Flourish Iron, but I do have carbon in the filter and read that the chelated form is absorbed by activated carbon, so that may be an effect. Was planning to switch to Purigen, which at least rumor has does not remove chelated iron or other common fertilizers?

It seems the test is accurate, I'm just not sure it is making any sense. I think I'd just like to see some iron in the DT I'll keep double dosing iron for this week and test on weekend.

That's interesting on carbon. I do have some carbon in both tanks. Pretty old stuff in cartridge filters that I just leave. But I've had the water in the small tank to a off yellow colour with no test result.

Idk, still a little confused I think. I keep thinking I'm doing something wrong.