specs are in the first post. the moss is Java moss. the heater is a Visitherm stealth, i think 150 or 200 watts, can't remember. i got it for my old 45 gallon that i tore down, and its the best looking heater i have, so i threw it in this one.
To deal with sealing the top, I am considering switching from HOB's to a couple powerheads with sponges on them. that way I can just have a solid lid with a small hole for the cords.