Adding a sump

[lastlight]

I didn't have a lot of room for baffles but I had 3 cut for that very purpose. In the end I only put one in (siliconed to the bottom of the sump, height sized for skimmer compartment. Then I have my heaters in the small return area after the single baffle with the whole compartment filled with rock. The rock takes care of nearly all my microbubbles. I plan to fill a few more key nooks with some smaller rocks later on but they currently stop >95%.