TFH Calming Bubble Tube for Gentle Light and Bubble MovementThe TFH Calming Bubble Tube creates a steady visual focal point with rising bubbles and color-changing LED light. Use it as a stand-alone sensory feature or combine it with compatible TFH accessories to build a larger bubble-tube area.Calming Bubble Tube Features Color-changing LED illumination for visual sensory engagement Adjustable bubble speed so the flow can be changed for the activity or user Switch-compatible design for optional bubble on/off control with a compatible switch Compatible controller options available separately for additional interaction Two heights for different room sizes and visual placements Choose Your Calming Bubble Tube Size 48 in. H × 6 in. diameter: SKU 9BC120A; approximately 5.5-gallon water capacity 80 in. H × 6 in. diameter: SKU 9BC200A; approximately 9-gallon water capacity Power: Transformer.Use distilled water for filling and topping off the tube, and follow TFH's supplied maintenance instructions.Calming Bubble Tube Installation OptionsThe tube can be incorporated into a sensory space using compatible accessories such as a padded Bubble Tube Podium, Touch-A-Color Podium or security bracket. Accessories are sold separately unless specifically stated otherwise.Adult supervision required.Compare more bubble tubes and accessories if you are deciding between calming and interactive control options.Choose the 48 in. or 80 in. tube based on your available space and preferred visual height.