Hi, i have a 15g jbj nano cube. I just been running the past 2 months with the water in the back all level with each other and a small lip between the filtration and main. Just figured out i should have it lowered little more and allowing water to go down 1st channel thru mechanical and then up thru 2 channel chemical creating small waterfall into return pump channel(pics for reference) so just spent time trying to level it out. Does it seem right? I really like the tank full to the brim where u cant see the light bulbs but itsnt possible without overspilling the 1st channel into the 2nd it seems. If this the proper way am i stuck with the small gap in the water and frame? Also bonus question - how would you set your ATO in this? I had a good way before but now messing with level idk where to put it where it will be consistent but dont want it sticking on the side of my glass





