Leak in my RedSea dose pump. my All For Reef had the unit all crusty. I felt the dose coming out so I change an unused head and disassembled it to find the leak. Clean tubing on each end and put it underwater to try and make it bubble. Such a tiny leak. The part, ReefDose Replacement Dosing Head Tube with Hose Barbs, is $10 ( a bit pricy for what it is) and no place has free shipping for just one. I will get a few to have them on hand as well as buy other things. I wish they had them on Amazon I could get them in 1 day
