CCFC Monkey
Fish Fanatic
My aquarium weed is changing colour from green to a dark brown, is this dying or is it normal?
Yes it does sound like it is dying, can you get any pics? Numerous plants sold at lfs are not actually true aquarium plants, some needing to be semi submerged, some not even being aquatic at all- generally speaking, if the plant can keep itself upright out of water or has varigated/two color leaves, it isn't an aquarium plant.
Other things can also lead to the demise of even true aquarium plants like not the right strength lighting or conditions in the tank.