I bought some anubias, not sure what kind but it's on a piece of driftwood very long stems with large round flat leaves, and some large java ferns. I'm annoyed because after about a week doing fine in the tank some of the anubias leaves turned bright yellow and fell off and some others seem to be rotting from the edge of the leaf moving inwards leaving mushy mess floating around my tank. It's not all the leaves only about 1/3 of the leaves are doing this. The java fern is doing better they lost a few leaves each turning brown and mushy while others are kinda turning see through. Will this stop on its own or should I do something? I use a small dose of seachem flourish in the tank only about 1/2 the recommended dose, the tank is 35 gallons and kept around 25 degrees C and I only have the lights on maybe 5 hours per day plus I use cut up place mats with holes in them on top of the tank so the light is filtered and not so strong. What am I doing wrong?