Vallisneria Posted June 6, 2012 Report Share Posted June 6, 2012 I got a giant amazon sword plant a couple months ago, it takes up about 1/3-1/2 of my 56gal. Its starting to show some deficiencies but I'm not sure what fert to add more of. Right now its in a heavily planted 56g with 4x39w, co2 and I'm EI dosing: NKO3, K2SO4, KH2PO4 and trace. I hadn't added a root tab in a while so tonight during the water change I added some Jobes sticks and flourish tabs as I know swords are heavy root feeders. So whats causing the yellowing? From what I can see its mostly the older leaves but even the newer leaves have some. I'm thinking its an N deficiency but I figured I'd ask just to make sure before I go messing with the ferts. Quote Link to comment Share on other sites More sharing options...
Quetzalcoatl Posted June 6, 2012 Report Share Posted June 6, 2012 This happens to my swords all the time, the leaf grow and then they dissolve in the water, I thought this was normal :cry: Quote Link to comment Share on other sites More sharing options...
ckmullin Posted June 6, 2012 Report Share Posted June 6, 2012 are the brand new leaves which are just unfolding green or yellow? Quote Link to comment Share on other sites More sharing options...
Vallisneria Posted June 6, 2012 Author Report Share Posted June 6, 2012 Green but as you can see in the pic they start to turn yellow. The first pic shows the 2 newer leaves on the left and 2 older leaves on the right. The bottom pic is just a close up of the newer leaves, which are just starting to show the yellowing Quote Link to comment Share on other sites More sharing options...
ckmullin Posted June 6, 2012 Report Share Posted June 6, 2012 If they are green @ the start it shouldn't be iron. I'm leaning towards a lack of N as well. Quote Link to comment Share on other sites More sharing options...
Jayba Posted June 6, 2012 Report Share Posted June 6, 2012 Sword uptake is through the roots, so the tabs will help. I can't grow them either..... Quote Link to comment Share on other sites More sharing options...
Vallisneria Posted June 6, 2012 Author Report Share Posted June 6, 2012 Anyone have any recommendations on how many root tabs I need for a large sword? How often to replace them? I've always kept crypts and just put root tabs every few months, never had a issue. So i'm not sure how much more a heavy root feeder needs. Quote Link to comment Share on other sites More sharing options...
geleen Posted June 6, 2012 Report Share Posted June 6, 2012 I use 1 stick broken into 4 pieces and place them around the diameter of the whole plant; every 6 months should be fine. You should see improvement within 2 weeks. John Quote Link to comment Share on other sites More sharing options...
Vallisneria Posted June 6, 2012 Author Report Share Posted June 6, 2012 OK thanks John. Hopefully the new tabs start to help Quote Link to comment Share on other sites More sharing options...
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