ive had these lillypads for around a year now. when i got them they had the typical pads but they didnt reach to the top of my tank. well now they put out leaves but the leaves dont grow out to much, and they look different. there is low flow where they are. 55 gallon tank 216w of T5 2x6500k 1xactinic white 1x redder bulb (i forgot it exactly) 79-80 degrees ammonia: 0 Nitrite: 0 Nitrate:20 dose with Flourish Excel (twice normal dose), and flourish (twice normal dose). water is well water (high in iron). and i do twice weekly water changes at ten gallons each. here are some pics showing whats going on, pardon the hard water build up, i need to get a razor and clean that off..: im just trying to figure out what is making them not grow. any ideas?