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Water Treatment : Colloidal Iron

What is Colloidal Iron?

Colloidal iron is an organic form of iron that can combine with other naturally occurring organic materials such as humic acids (tannins). It can give the water a yellow to brownish hue and is often found in shallow groundwater wells, surface water or groundwater under the influence of surface water.

The particle size of colloidal iron is very small — in the micron and submicron size ranges — compared with other forms, and it has a surface area and charge that will prevent it from being removed in the same way that Iron (Fe) is. Consequently, colloidal iron is extremely difficult to remove and is basically non-filterable with typical media type treatment such as our Iron Max. 

Colloidal iron and will require strong oxidation, usually by injection of chlorine, ozone or hydrogen peroxide followed by filtration to remove the oxidized iron. Activated carbon filtration may be also needed to remove any residual chlorine. Note: Colloidal iron will require longer contact time and a separate retention tank will be required.    

 Contact RainDance Water Systems for colloidal iron filtration: Email: Sales@RainDanceH2O.com  



Colloidal Iron Treatment Systems: The Iron Max Plus - This multipurpose filtration system uses oxidation followed by small micron filtration  


Iron Max Plus-9
Flow Rate: 8gpm
Pipe Size: 3/4" or 1"
1-5 Person Household / 1-2 Bathrooms
Best For Approx. 1-500 GPD


         Iron Max Plus-10
Flow Rate: 10gpm
Pipe Size: 3/4" or 1"
1-8 Person Household / 1-3 Bathrooms
​Best For Approx. 1-1000 GPD


Iron Max Plus-125-12
Flow Rate: 18gpm
Pipe Size: 1" or 1.25"
1-10 Person Household /
1-4 Bathrooms / Light Commercial
Best For Approx. 1-1500 GPD

The Twin Alternating Iron Max Plus system is designed to provide a continuous, unlimited supply of filtered water with dual alternating filter tanks that stagger backwashing cycles so one tank is always ready to filter water no matter when you need it!

Twin Iron Max Plus-10
Flow Rate: 10gpm
Pipe Size: 3/4" or 1"
1-8 Person Household / 1-3 Bathrooms / Light Commercial
Continuous Iron & Sulfur Bacteria Filtration


The Iron Max Plus Inline Package is specially designed for well water users that have a shared well or are unable to use an electric chlorination pump and want the hassle-free installation of an inline system!

Iron Max Plus Inline Package
Flow Rate: 10gpm
Features: Non-electric chlorine feeder, contact tank, maintenance-free iron filter, post carbon polishing filter
1-8 Person Household / 1-3 Bathrooms / Light Commercial


The Iron Max Plus-FX series uses the same high performance filtration as our Iron Max Plus package treating iron bacteria, sulfur reducing bacteria, up to 30ppm ferrous & ferric iron, up to 5ppm manganese, up to 3ppm hydrogen sulfide gas odors, sediment down to 3-5 microns, and can also reduce the effects of hard water scale with the built-in salt-free hard water module!


Iron Max Plus-FX-10
Flow Rate: 10gpm
Pipe Size: 3/4" or 1"
1-5 Person Household / 1-2 Bathrooms / Light Commercial
​Best For Approx. 0-1000 GPD

*Exclusive RainDance H2O Store Product!

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