Dissolving leaves

[Dragon Queen]

On my 29gal over the past few months the leaves on the Ludwigia repens, it green though have all melted some grow back, but there are just stems there now. The Cryptocoryne wendetii 'Bronze', Cryptocoryne lutea both have been getting holes and lately I have been pulling about 4 leaves out because of melting. However the Bacopa carolina is growing like crazy with no problems. At first I thought it was a K def, but I have been dosing every week and it is slowly getting worse. Also dose Excel currently. :confused: :shark:
ph 7.5 nitrates 30-40
kh 7 nitrites 0
gh 10 ammonia 0
Phosphates 2.5-3
Thanks :bowing: :bowing:

[Primetime]

Maybe iron deficiency? I had the same problem, did some research, and found out I had iron deficiency. Its been ok eversince I added Flourite.

[Dragon Queen]

Doesn't iron def turn the leaves yellow w/ green veins? The color of all my leaves are fine. :hang: