Nature2 M Series Cartridge CRM25 25,000 gal. (W28155) - 2CM25



Model # 2CM25

By Nature2

  4.89 Average  



Model # 2CM25

Product Description

This is the replacement cartridge for the Nature2 CRM series sanitizing System

Capacity: From 5,000 to 25,000 gals.
Run time: six hours daily (minimum)
Circulation system flow rate: 25-80 gpm (inline)
Cartridge flow rate: 10-18 gpm (internal bypass)
Cartridge selection: (one size available) 5,000 - 25,000 gals

6 Month Cartridge 


?     Asked on 3/24/2016 by Mike

Can the nature 2 be used with a salt generator, is it compatible with saltwater?

A     Answered on 3/24/2016 by Lennox H.

Hi Mike, You can use a Nature2 Mineral Sanitizer on a salt water pool.

?     Asked on 4/1/2015 by Tom Hood

The current cartridge I am using for my Vision Nature2 purifier is "W28165". Will this cartridge #W28155 work in my unit?

A     Answered on 4/1/2015 by Lennox H.

Tom, the W28165 is for an above ground pool system. The W28155 will not fit because the W28165 is for the CRA Series and the W28155 the CRM Series.

?     Asked on 11/30/2014 by Mark

Is this the same part as the N2CM/W28155 cartridge?

A     Answered on 12/1/2014 by Robert M.

Hello Mark - The 2CM25 is the same as the Zodiac W28155.

?     Asked on 8/1/2012 by Guest

I usually use the Nature 2 G series cartridge which is much taller. Will the Nature 2 M series work in my container?

A     Answered on 8/1/2012 by Patrick P.

No the Nature 2 M Series cartridge will not work as a replacement for the Nature 2 G Series Cartridge. We do sell the Nature 2 G Series cartridge here listed as CRG25, CRG35 or CRG45.

?     Asked on 7/14/2006 by Guest

I would like to know what type of weekly maintenance (chemicals) is necessary with the Nature2 system?

A     Answered on 7/14/2006 by Patrick P.

With the Nature2 you would maintain your pool the same way as if you did not have Nature2.  The only thing that will change is that you will maintain a lower chlorine residual with the Nature2. Instead of maintaining a chlorine residual of 3.0, you would maintain a chlorine residual of 1.5 with Nature2.  This results in using approximately 50% less chlorine.


Review Summary

  (Average 4.89 out of 5 stars)
9 Rating
5 star:
4 star:
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1 star:

The Most Helpful Review

1     2

 (5 out of 5 stars)  Fantastic Filter


Pros: Keeps pool perfect....with fewer chemicals, or chemical adjustments needed!

Cons: Be sure to have pool water balanced before adding new will be much more efficient if you do!

We have always used this filter. Early this spring, we needed to replace it and put off getting a replacement for several months....bad idea! We have had to add more chemicals to our pool this year than we ever have! Once we got the pool balanced again, we put in our new cartridge and, whew!...haven't been having to add near the chemicals to keep that "perfect" water! I highly recommend this filter system and the cartridges.

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The Most Recent Reviews

 (5 out of 5 stars)  Great Sanitizer

from Melbourne, FL ()

Pros: Easy twice a year replacement.

Cons: None

This cartridge works in my Visions Filtration System. It allows me to keep the pool sanitized without a high level of chlorine. In fact, the chlorine content of my pool is at a lower level than the water I get from my tap. And that water is very good.

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 (5 out of 5 stars)  Great Swimming Pool Cleaner

from Phoenix, AZ ()

Pros: none

Cons: none

I like shopping at Inyo Pool.

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 (5 out of 5 stars)  Good Product

from Napa, California ()

Keeps our chlorine levels lover.

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 (5 out of 5 stars)  Excellent Filter

from Alabama ()

Pros: very easy to use and less expensive than other chemicals.

Cons: Have not found any.

This filter is used with Nature 2 systems and is one of the best cleaning systems I have found during my 33 years as a pool owner. Before nature 2 I used to have an every summer battle with green algie. Since switching to this product approximately 10 years ago I have not had any problem with algie. It is so much easier than having to keep chlorine levels adjusted and measured each week.

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0     1

 (5 out of 5 stars)  Nature 2 cartridge

from South Burlington, VT ()

Pros: no weekly chlorine hassle

Cons: if forget to check on the cartridge you run out of chlorine without knowing.

Nice to purchase online. Cheaper and less hassle. Auto chlorine is easier, you use less chlorine and there is less chance of problems such as algae due to forgetting your chlorine. Just have to replace once per month - about.

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 (5 out of 5 stars)  Great Nature2 filter

from Schertz, TX ()

Pros: Replaces the need for over treating with chemicals.

Cons: Hard to come by at local pool supply stores

We've used this filter in our pool for years and it's makes such a difference in using chemicals in large amounts. It's such a good feeling not to have all those chemical affects on your skin and hair.

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 (5 out of 5 stars)  use less chlorine, easy to change cartridge


Pros: easy to change, good price, good for whole season

Cons: didn't come with replacement gasket

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