Here's how I get great success. Rubbermaid brute 20 gallon. Danner pond pump. Go to drsfostersmith.com for this, get the one that draws about 25 watts for a single pail or the larger one that draws approx. 100 watts for enough air for ten or more of these pails. Acquire an 8" round aluminum oxide air stone from the same website. Connect the air stone with this conduit schedule in this order: Pump, 3/4" vinyl tube (6" long) 3/4" x 1/2" hose barb x hose barb reducer, 1/2" vinyl hose ( approx. 6') ,1/2" hose barb x 1/2" mpt adapter, 1/2" fpt x 1/2" socket pvc. sch. 40 adapter, 1/2" x 1/2" socket 90 degree adapter, 1/2" pvc ball valve pvc.sch.40, approx. 20" of straight 1/2" pvc. sch. 40 pipe, 1/2" socket x 1/2" fpt adapter, 1/2" mpt x 1/2" hose barb adapter, approx. 8" of 3/8" blue weighted tubing (also available on drsfostersmith.com, check the pond supply links) connected to your airstones 3/8" hose barb adapter with no less than 2 black zipties on each side. Don't forget to put teflon tape on your threaded joints and pick up some pvc glue and primer. Don't use stainless steel hose clamps under water because they are much harder than the plastic surface of the res and could scratch things up. Adjust the ball valve for optimal bubbling.
Lose the lid on the 20 gallon rubbermaid container and use a round piece of 3/4" polyshield foam as a lid. Remove the clear side plastic coating so there is no plastic film on the underside. Reflective side up, of course. Poke 1/8" holes, preferably with a 1/8" hex head t-handle grip allen key. You will comfortably fit 59 clones on a small foot print. Graph the lid with a straight edge and neatly mark your holes to be punched being careful to evenly space them the best you possibly can. Save this first foam lid as a template for all other lids. Do your best to control the water level, in the case of using this air stone, the bubbling will be so vigorous that you can be as far away as 4" from the bottom of the clone to the top of the water level with no problems. No sprayers necessary. Just the worlds most superior air stone for a rubbermaid pail dwc with the most suitable pump.