I love this idea and I'm stealing it for 4 filters on my 3 tanks with clip on lights. I know I want different plants in each one and know all the plants I want to grow in the filter. However I am having trouble coming up with more than just Monte Carlo on the spill away mesh. I want to put Staurogyne Repens in my penguin 100B and Anubias nana in my penguin 150B, both are on my 40g breeder. I also what to put a Java Furn in my quietflow thats on my 15g. My 38g has a AquaClear 50, but because of the way the light is on it I can only do the spillway. I intend to use my Monte Carlo on the 38g but I'm at a loss for the other 3 spillaways.
EDIT: I just noticed your automatic top off, vary cool.