I dont understand pothos some time. In the main tank its been "planted" for a long time..... in the girls 55gallon half the time, and in the snappers tank little less than the 55... The 55gal and snapper have grown alot. The main tank, Iv gotten a total of about 6 leaves ha, I average 1 per month. The only thing that could possibly be the affect is the pothos in the main tank are near the end of the line, where the other tanks its the only plant.....