Three differnt plants, in three differnt parts of the tank have all started doing this in the last couple of days.

Nitrate is at 20 and phospahte at 1. Any other details that is required to help?

have started doing what exactly?

are the leaves dying off?

help me help you...

help me help you.... awesome.

They have started yellowing, and the first pic yellowing with brown spots.

Yellow leaves over all of plant is lack of iron,yellow leaves in conjunction with green spot algae is lack of phoshate and pinholes is lack of potassium.The brown spots on the leaf is natural and is why that plant is called Echinodorus ozelot (after the spots on an ozelot).

:gopo:

sounds like you need to do some ironing

may as well cut the yellowing leaves off

The plant it self is not yellow, just some of the leaves. So with my phosphate at 1, should I be lookingto increase that to say 1.5 or 2?

As plants start to mature I assume they start getting more hungry for nutrients, does this mean after a while I will need to increase all of my ferts or will keeping them the same be ok?

did you not put ferts or anything in the substrate?

i used daltons and flourite, don't have to add anything else, never have and you seen how bushy it is lol

I had JBL root balls under the plants. Doing EI salts for water colum ferts.

Swords are heavy root feeders, the jbl balls need replaced usually every 6-12 months dude. May pay to shove another couple under your big swords.

The tank hasn't been running for 6 months yet, but I will shove a few more around the base of them