Melting plants... help!

[PNA]

Some of my plants seem to be melting. They've been doing fine for a while but now the leaves on some (dwarf sag, & amazon sword) are turning 'see-through' and melting away. The sword also has holes in its leaves. I even noticed one java fern I have is starting melt as well. I'm worried I'll lose all plants in the tank.

I'm guessing that it's a fertilizer issue. I've recently started DIY CO2 on the tank. Could it be that the ferts can't keep up to the CO2 & light?

Any help on what I should do? Root tabs? Liquid fert? Or just stick to plenty of water changes?


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[BigDaddy]

Holes in old leaves is a sign of potasiium deffeciency.

Get some root tabs under the affected plants, or start a regiment of liquid ferts.  Root tabs would be the preferred method, as swords and sag are both heavy root feeders.

[PNA]

I'm getting holes in new leaves!
And the whole java fern plant is 'see-through' now.
I'll try the root tabs and another big water change.

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[BigDaddy]

Root tabs won't help the java though.  You'll need a liquid fert for that, as java roots are just for attaching itself.