Red Sea ReefDose Head Assembly — Replacement Dosing Head for ReefDose 2 and 4

The Red Sea ReefDose Head Assembly is the complete replacement dosing head for ReefDose pumps: a direct-drive planetary gear-motor with ±0.05 ml accuracy — down to a single drop — that clicks on without tools or alignment. Fits ReefDose 2 and ReefDose 4.

What's in the box

• 1 complete ReefDose dosing head (ready-to-mount assembly)

Red Sea part number: R35345. The secured connectors take the official ReefDose tubing of 5 mm outer diameter (3 mm inner).

Our advice

Two symptoms tell you a head is on its way out: it stops dosing altogether, or it starts making odd noises — that's when we start thinking about replacement. That said, these heads last a very long time. Our habit at the shop: keep a spare head in stock, because a failure never happens at a convenient time — and since the part isn't expensive, you're always prepared.

Official how-to videos

How to setup a ReefDose head

How to replace the inner tube of a ReefDose head

Complementary products

This head fits the Red Sea ReefDose 2 as well as the ReefDose 4. While you're at it, refresh your lines with a ReefDose 4 x 3 m tube set.

Frequently asked questions

Does this head fit both ReefDose models?

Yes — it suits the ReefDose 2 and the ReefDose 4. The heads click on and off without tools.

Should I replace the whole head or just the inner tube?

Red Sea documents both: the head's inner tube can be replaced on its own (official tutorial above), and the complete head swaps out with one click when it's done. When in doubt, write to us with the behavior you're seeing.

Why buy from ReefSolution

Aquarium ReefSolution is an authorized Red Sea dealer in Laval. Secure delivery across Canada. Free shipping available depending on order amount.