let it run constant,it will get gunky from time to time,you'll know when bubbling gets faint,just let it soak for awhile in some bleach then rinse it(air-stone or bubble wand)....bonbon
bonbon Reviewed by bonbon on . air pump in ebb & flo should i leave the air pump in an ebb & flow system on all the time or just during flooding and draining? Rating: 5