Red Sea liquid additives in the 500mL and 1000mL bottles come with a "dosing ready" bottle cap. All you will need to do is add the tube to your bottle's redesigned cap and then connect it to your dosing pump for automated, easy to refill dosing system.
These Red Sea Dosing Cap Tube are for use with Red Sea Reef Care Program additives with the new style caps
The Tube connects the new style cap to a dosing pump
