I have plants in my tank, can't remember what they are called, but the tips of the leafs are turning dark green and some the tips are turning brown. I have started using API's leaf zone but if it's doing anything to help it's only a little bit. I have a T5 full spectrum tube light on top of my 30gal which seems like it's good. I have been fighting some what I think is brown algae growth but my fish are doing great and I change out 5gal every week. The changes in colour do seem to be the only issue that my tanks have besides me needing to finish clearing up the brown stuff which is here and there.:help: