Throw an airstone into your reservoir - will increase growth 25%. I use a box lined with mylar over my aerogarden - cut small hole on top and put cheap fan ($7 for 4" at Walmart) to cool the light and reservoir. Also, with box, leave a place for air venting. Mine is on the dresser with the edge of the box overhanging the dresser. My babies at 10 days are twice as big as yours - will post more pics today for you. Yours look good - nice and healthy. What strain are you doing? Do these couple things and every day you will say wow! Watching them grow is better than TV.