H2 Series Citric Acid Cleaning Cartridge

H2 Series Citric Acid Cleaning Cartridge Kit include 2 filters: the first one (left side filter) contains enough citric acid for one full internal cleaning, and the other one (empty filter) acts as a place holder for the right-side filter. This 2-filter combination allows your main filters to be completely removed for the internal cleaning process. It also comes with 2 plugs. If you select the Delphi H2 option you will also receive two wire chips to plug into the empty harnesses when you remove your filters. You don't need these for the counter-top versions.

The H2 Series water ionizers have continuous-cleaning inside the water cell, but if your water flow-rate slows it may mean it's time to do a citric acid wash. The citric acid cleaning is also a good preventative measure that many people do yearly to keep the machine fresh. 

Citric Acid Cleaning Cartridge Directions for the Counter-Top Water Ionizers

[Melody II, Athena H2 and Vesta H2]

1. Unplug the machine. 
2. Switch the regular filters with the corresponding special Citric Acid filters in the appropriate spots.
3. Insert one of the included caps onto the tip of the acidic-hose (grey hose) of water ionizer.
4. Gently curl and tilt the Top Spout (flexi-hose) upward, so much of it is up above the height of the ionizer. 
5. Turn on the water flow (slow flow) until drips start to come out of the tip of the alkaline spout. Then turn it off and immediately cap it with the other cap included in the kit. 
6. Let it sit overnight.
7. When the time is up, set the flexi-hose back down into its normal spot and remove the plugs from the alkaline and acidic ports. 
8. Turn on the water flow (machine still unplugged) and let it flow freely for 5 minutes. 
9. Remove the empty Cartridges and return the regular filters to their normal spots.
10. Plug the machine back in.
11. You are now finished.

Directions for the Under-Sink H2 Water Ionizer

[Delphi H2]

1. Keep the Delphi plugged in
2. Exchange each regular filter with the corresponding Citric Acid cleaning filter
3. Connect each of the 2 filter wires that come with the Delphi kit to each of the now-empty filter wire harnesses
4. Put a plug on the acidic water spout
5. Turn on the water slowly (purified water setting)
6. As soon as you see the water flow out of the alkaline spout stop the machine and put the second plug on the alkaline spout
7. Let it sit overnight.
8. When the time is up, remove the plugs from the alkaline and acidic spouts. 
9. Turn on the water flow (purified setting) and let it flow freely for 5 minutes.
10. Remove the empty Cartridges and return the regular filters to their normal spots. (and reconnect the normal filter wires)
11. You are now finished with the cleaning process.

Citric Acid Cleaning Demo Video

This demo shows both countertop H2 water ionizer cleaning instructions (~1-minute mark) and the Delphi H2 undersink instructions (~2-minute mark) . They're a bit different.