Lines and poor quality old leaves
I am having the same issue as Jeffww. I started my own thread since posting in his someone told me to start my own thread. the problem i am having is basically the same he is having, my stem plants mainly Rotala's the old growth gets lines going across the width of the leaves and the older leaves eventually turn brownish and look like crap. A little info on my setup.
Mr Aqua 48 Gallon
ADA soil (which is now over 3 years old)
2 Freshwater AI Prime lights - photo period 7 hours
Sun Sun 704B - ( I have a ton of Purigen in it which Im not sure can have an affect on the ferts or anything)
CO2 injection via 80mm precision atomizer (roughly 3bps) - on 2 hours before lights off an hour before lights
Ferts: I was using Nilocg DIY Liquid EI ferts for a while and could never figure out a good balance, if i dosed the recommended amount and did a 50% water change on the 7th day by the end of the week the tank would smell sour and after a few weeks the plants would just melt and all the leaves would fall off and float. If i dosed it lean some plants would do ok and other would fail pretty quickly. I decided to try and switch to Thrive+ and see if there is a difference. I am also Using the Roottabs from them, as well as Seachem Iron after water changes. I currently now do 2 40% or so water changes a week.
The only test kits i have are for GH and KH. I use straight tap water.
I keep the GH in the tank at 8 and the KH is around 2-3.
I do have a large bio load with the fish, but i feel the 2 water changes a week and such a large filter handle it pretty well.
Any help or advice would be appreciated. Yes some plants need to be trimmed and they all need to be organized better, but Im more worried about getting them healthy at this point in time. Im not the best photographer with a cell phone but if not visible in my photos Jeffww has good ones that look to be the same problem im having.