These were the worst plants but definitely looking better I have been pinching off the leaves like this (or in a few cases just chucking the plants as I have a bit too much).Hi all,That looks much better. The new leaves look good.My guess would be that they are the leaves that were nutrient deficient, because it was a deficiency of a non-mobile nutrient (possibly iron (Fe)) the plant can't improve their condition.
I'd probably just pinch them off.
The poor leaves were like the lush green ones a week or two ago and I have always noted this in my other tanks that some leaves end up getting stuck underneath others so don't get the light and end up going underwater. Quite often these poor leaves aren't visible unless you take the plant out and turn them over.
I am going to monitor them a bit more closely over the next few weeks but hopefully things are back on track.