Ultra Refill Water Cartridge - Compatible with Electronic Humidor Humidifiers, Cigar Oasis Ultra Humidifier, Enhances Humidor Experience, Fits Ultra Models/Ultra, 2.0 & 3.0

The old green foam does not last long. The new white sponge foam is not very functional. Poor replacement so I purchased a brick of green florist foam on Amazon and cut off a section that would fit inside the plastic cartridge which I carefully cut open along the glued seam with a utility knife. The cartridge works great and now it’s very easy to replace the foam when needed at a very cheap cost. After replacing the green foam the cartridge snaps back together. No need to keep buying cartridges that don’t last. Now the cartridge is EVERLASTING PROBLEM SOLVED!!!!!!!

Quality replacement for the used up old cartridge, this thing works well to keep your cigars fresh

Bought the ultra 3.0 and over the years the refill water cartridges get worse and worse, cheap foam insert that used to be a resin that held distilled water for a month, now barely absorbs water and is dried out in a day or 2. Very disappointing.

When I received this refill cartridge I notices it was not the same as previous ones I've purchased. These cartridges normally came pre-filled and had tape over the opening to keep the cartridge from evaporating. When you felt the cartridge it had a little weight to it. This one was light in the hand and when I opened it, I could see it was not pre-filled. It had no tape over the openings. I gathered there was a change in the process and when ahead and charge this new one to get it ready for use. The first charge only lasted 6 days before my Oasis fan began running almost constantly. After an over night recharge, the second recharge only lasted 4 days before the almost constant running of the fan. The merchant did contact me and offered a satisfactory resolution which was most appreciated. Cigar Oasis and the merchant confirmed the new cartridges no longer come pre-filled.

They work okay, but they're not as absorbent as the older ones.

Fit perfectly in my 3.0 model. Holds water unlike the unit it replaced. This has a green core, stay outdoors away from, or replace, with this unit to breath life into your cigars! Thank you for this r replacement. Works 1000% better.

there is a trick to this little item, when i first started using it, seems as if it wasn't holding a charge... found out that if you put it in a air tight container filled with distilled water, it'll keep things fresh for about a month, if you charge it just as your other peters out, it'll last for less than a week, so i let mine soak for about a month and it works great!

I've reviewed these before. I like the system--it's works well when the cartridge works. But, for $15 you'd expect better performance form the cartridges. Sometimes they soak the water right up, other times you spend a lot of time trying to get them to work (or give up and order a new one). After many repeat purchases, I think I may start looking at other alternatives--this is just to much of a hassle.

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Dry as a bone , will not absorb water , the old ones that were three that I bought these to replace hold more water once soaked than these, extremely disappointing

Overview Use these in an Oasis Ultra 2.0 humidifier. There really in not an non OEM alternative that I am aware of...so if you are happy with the Oasis unit...keep a few of these on hand. They hold enough water to go about 3-4 weeks without recharging...during the dry winter months (when the humidifier get the most work). It can last over 6 weeks in the summer. Time will depend on the relative humidity where you live...and the quality of your humidor. I change them out every 6 months or so...as the absorbent material inside the cartridge deteriorates and before the absorbed odors get stale smelling. Pros -Simple -effective Cons -None Recommendation – Would buy it again and would recommend. <---Click below if you found this review helpful--->

Works very well. Soaks up a lot of water without leaking. Does not break down as fast as the green sponge material.

Only good for about a year as the sponge doesnt seem to retain as much water as time goes on. The frequency of adding water becomes annoying. But for a year its great. Set it and forget it