My aquarium

[bazz]

Looks to me like Amano Shrimp could be the probable cause, try adding blanched Spinach, nettles, courgette etc on a regular basis.

 

[John.D]

I’ve been looking through loads of posts on here, the duckweed index etc m.
I have come to the conclusion that I need more iron in my ferts. I’m going to try and add more iron and see if I get any difference.

 

[dw1305]

Hi all,

I have come to the conclusion that I need more iron in my ferts.

If you have hard, alkaline water? Iron (Fe) deficiency is always a possibility.

This is what you are looking for, pale new leaves, <"What is the “Duckweed Index” all about?">:

I’m going to try and add more iron and see if I get any difference.

It is not so much more, it is more supplying "plant available iron", have a look at <"FE EDDHA">.

cheers Darrel

 

[John.D]

Yes being from Herts, the water is very hard.
Some of the leaves are yellow, and I haven’t seen a big increase in the amount of duckweed for the 3-4 months of the tank being active.

I did read through the post you send a link to. I think I’m starting to understand.

 

[YCChen]

Yes being from Herts, the water is very hard.
Some of the leaves are yellow, and I haven’t seen a big increase in the amount of duckweed for the 3-4 months of the tank being active.

I did read through the post you send a link to. I think I’m starting to understand.

Ah I'm also in Herts so this may well be (part of) my problem too. My frogbit was happily spreading but new leaves have been looking yellow recently. But I did also realise today that my filter came with activated carbon hidden in between the included fine filter media which must be absorbing the ferts I'd been dosing 🤦🏻‍♀️

 

[Connswater]

activated carbon

Not in my experience does activated carbon remove macro or micro nutrients, I do however, reduce the hardness of my water from KH of about 18 to about 8-10 and I add sequestered iron after water changes and if plants look pale/yellow. Good luck.

 

[YCChen]

Not in my experience does activated carbon remove macro or micro nutrients, I do however, reduce the hardness of my water from KH of about 18 to about 8-10 and I add sequestered iron after water changes and if plants look pale/yellow. Good luck.

OK that's good to know, thank you. I only know to use it to remove medications but based on that assumed it also would remove nutrients the plants would like.