1) 3″ plant site location (can be covered). 2) Sturdy 1/4″ ABS lid. 3+4) Fitted edges for a tight seal. 5) Brain plumbing inspection dome (light tight cover not shown). 6) 3″ ventilation & access port. 7) 1/2″ holes for brain lid handles or ? 8) Removable “brain” lid. 9) Dimples on lid for 1/4″ holes used for airstone & misting nozzle placement or ? 10-11) Dimples for holes through lid & tray (fixed) used for plumbing to and from underneath of unit.
12) Directional flow toward right 13) Raised wall forces water to take a directional path through each side. 14) Raised wall acts as dam & floods evenly into both sides. 15) Brain area to circulate reservoir water, monitor & mix nutrients, adjust ph, plumbing or ? 16) Recessed area for large air stone, fogger, brain drain or ? 17) Recessed drains on both sides allow complete draining. 18+22) Curved walls direct mist, water, & air. 19) Fitted edges for a tight seal. 20) Smooth walls & removable lid for easy cleanup. 21) Angles ensure coverage & directional flow. 23) Strong lip & lid hold plenty of weight.