Everytime i put a plant in my tank something happens to it and it dies? i just put a sword in yesterday and..?

today the tips are black i have java and anubias there fine but the valisinerias turn transperent and die and my sword since the tips are black i guess are diying. i have a 40 gallon freshwater tank with a 96 watt florecent light i change the water weekly and add leaf zone why is it not working for me i checked the water and everyting is perfect ??


the fish i have inside are tetras











umm something else some parts of my java fern are pitch black !!! WHYYY

Everytime i put a plant in my tank something happens to it and it dies? i just put a sword in yesterday and..?
well you got two different things goin it sounds like to me ..





1 the val's are a very touchy plant, and need to be planted with just the roots into the gravel, not the whole root ball , or they turn transparnet and melt. personaly i have never had success with them.


2 the black tips ont he plants does it feel like velvet? it may be black algae starting to grow, but you can out smart it , by planting a whole bunch more of nutrient sucking plants like water whisteria, anything that is fast growing, and stemmy . by over planting the tank with these , you starving the black algae from its food source, your also providing more oxygenation for the fish,and the bactrerial bed as well . the plants since they use the fish poo as fertilizer once the bacteria break it down for them will explode with growth under the condidtions you now have , and it will out compete the black algae .