Bottom 1/3rd of my stems turning brown

[micardiz]

My non co2 tank is 1 month old. A few days back I noticed the bottom half of the stem of my stem plants are turning brown. This browning had sort of progressively spread to some of the other plants. I have removed the affected plants but could someone help explain why this happens? My substrate is AS Africana, Lighting 1 wpg with T5 lights . I have good circulation in the tank. No co2. Dosing with modified EI method like Tom Barr's advice. Tank is 4 feet.

[wethead]

Sounds like Light deficiency to me mate. Without seeing any parameters or pics that is.

What speicies are the stems and some water conditions may help others help you.

[newtank]

My non co2 tank is 1 month old. A few days back I noticed the bottom half of the stem of my stem plants are turning brown. This browning had sort of progressively spread to some of the other plants. I have removed the affected plants but could someone help explain why this happens? My substrate is AS Africana, Lighting 1 wpg with T5 lights . I have good circulation in the tank. No co2. Dosing with modified EI method like Tom Barr's advice. Tank is 4 feet.

apparently this is quite normal, even Mr Amano face the same problem. Its definitely has something to do with lights although I am not sure if it's deficiency. Its probably have to do with path of lights as the bottom part is mostly blocked so no matter how much lkight you put in , it will still be blocked.