Hi Tom and Aquabillpers

Thanks for your replies. The worst off of my Hygros seem to be those planted next to the intake valve of my filter, is it possible with them being at the furthest point from the outtake flow of my filter, that they are not getting the same supply of nutrients, could the intake valve be taking nutrients away form them before they get a chance to absorb them?

I am running my CO2 into my external filter too, could this be affecting the growth rate if they are furthest away from the filter flow and CO2, or would the fact the CO2 is being absorbed in the filter make no difference to this?

Would you suggest that I carry on with the water changes 2 a week with the dieing plant matter I am getting, can I risk starting to slacken off to 1 a week instead?

Perhaps Aquabillpers I also share your problems of bad karma as I have always struggled to grow stem plants, or maybe you have passed your bad karma on to me, either way at least it takes off some of the blame on me!