The ring controls shape and size of the fan-shaped flat stream outlet on the Pulser and the Rotating/Pulser. Three selectable options:
4 discreet holes in a fan shape
A narrow slot
A wide slot
Replacement splash lens for Current USA light fixtures, models 1024, 1027
Captive Sun Ballast
Standard replacement lens for Angel A1 and A1P LED Light Systems
For light systems mounted 18" - 36" from the bottom of the aquarium (standard).
Hydra water flow accelerators are designed to add increased and varied directional flow patterns to aquariums. Utilized as the the return fitting in your plumbing, these units greatly enhance your aquariums flow.