New Leaves Turning Brown

[outofstep]

Hi guys. I just bought an Amazon Sword Plant for my tank, but new leaves are turning brown. I have roughly 3 watts per gallon(its overdriven) and DIY CO2. I also use Tropica Master Grow. My substrate is aquarium gravel thats roughly the size of M&Ms.

Ok. I think its lack of iron from what I've researched but I'm not sure. Now is this due to bad substrate or is to Master Grow not providing not enough of a certain nutrient?

Should I consider changing substrates? I have mostly easy to care for plants. The Amazon Sword, being the most difficult.

 

[rich311k]

Sounds like iron to me as well. You can add iron. Flourish has an iron supplement. The substrate should be fine. Try adding a fert tab under the sword they are real root feeders.

 

[Wizzard~Of~Ozz]

I have resin rocks in my tank (colourful gravel junk) and putting a root tab or 2 by the sword will make a huge difference, my uruguay sword was growing 1 leaf every 1.5 days to recover (just over 3 a week) and is now very strong..

I used seachems flourish tabs. 1 under it, then 1 month later I added 1 on each side of it. amazing difference.

I had to cut all but 5 leaves off when I got it. It's now huge.

 

[outofstep]

Thanks for the help. I'll give the fert tabs a whirl.