Water Filtration Series #2: A Guide to Whole-House Filtration for Iron, Manganese & Odor Problems
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| Iron Curtain - Whole House Filtration System |
We’ll cover:
- When and how to know you need a whole-house filtration system
- Which type of system works best for the water issues being treated
- Why the right filtration system matters
- How to choose the right system and solution for your water, home, and family
Why Iron, Manganese, H2S (odor), and Low PH are often referred to as "Problem Water"
Water with high levels of iron, manganese, H₂S, and low PH is often called "problem water", and for good reason. These issues can be stubborn, and solving them can take trial and error and expertise.
Many homeowners (and even some “experts”) try to fix these problems with oversized filter cartridges before or after a water softener. Unfortunately, this approach is only a band-aid that rarely lasts more than a few weeks to a few months. Resulting in poor water quality, frequent repairs on water treatment equipment, plumbing fixtures, water heaters, and all water-using appliances, and, unfortunately, early replacement of the water treatment system due to failure.
A proper solution starts with a professional water analysis. Without it, you risk wasting money on water treatment equipment, appliances, filters that clog quickly, are expensive to replace, and fail to deliver clean water.
Do you need a Whole-House filtration system?
➣ Here are 10 signs you need a whole-house water filtration system:
- You have a water softener, but still have iron staining throughout the house.
- You’re using water softener salts like Red Out, Iron Fighter, or System Saver to remove iron.
- You rely on additives like Iron Out or Rust Out to clean your water softener.
- You’re constantly scrubbing rust or black stains from toilets, sinks, and showers.
- Women of the family need frequent hair treatments to remove iron.
- Your laundry comes out with rust stains, discoloration, or spots.
- Your hot water or bathwater is consistently discolored.
- Your water smells rusty, swampy, musty, and has a rotten egg odor.
- Plumbing fixtures and appliances are showing signs of rust in your water.
- You leave a freshly drawn glass of water sitting for a while, and it turns discolored
Why a thorough water analysis is critical in designing the proper whole-house filtration system and using the right filtration media
Tap Score - Well Water Test Kit
Water testing report parameters- Water hardness levels
- Iron, manganese, hydrogen sulfide levels, and more
- PH of the water
- Alkalinity of the water
- Turbidity levels
- Absence or Presence of bacteria (E-Coli),
- Total Organic carbons (Iron Bacteria)
- Volatile Organic Chemicals (VOCs)
- Total Dissolved Solids (TDS)
- Nitrates/Nitrites
- Arsenic
- Radium
- Sulphates/Sulphites
- Sodium
- Chlorides
- And much more
➣ Low pH of water (below 6.5) makes it difficult for iron and manganese to precipitate out of water and consequently more difficult to remove with typical filtration methods, without PH adjustment and chemical oxidation. PH adjustment may be required to elevate the PH level closer to neutral (7) and above before tackling iron, manganese, odor removal, and other water chemistry issues.
Whole-House Filtration System Options
Here are the most common whole-house filtration systems professionals use to treat problem water — with the pros and cons of each system.
1. Manganese Greensand Filters
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Uses potassium permanganate or chlorine to regenerate the filter media.
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Good for moderate levels of iron, manganese, and H2S.
👍 Pros: Affordable, effective for moderate water problems.
👎 Cons: High maintenance, heavy media, requires strong water pressure & high flow rates to efficiently backwash filter media. Low water flow rates through the filtration system. These things are a total mess with spilled potassium permanganate! Take it from my personal experience.
2. Chlorine or Hydrogen Peroxide Injection Systems
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Injects an oxidizer (Chlorine or Hydrogen Peroxide) to treat iron, manganese, H₂S, and bacteria.
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Includes a retention tank for contact time and carbon filtration to remove oxidized particulates and residual chemicals.
👍 Pros: Excellent for stubborn iron bacteria and high H₂S levels.
👎 Cons: Complex system, weekly maintenance, potential chlorine/hydrogen peroxide by-products.
3. Ozonation / Filtration System 
Hellenbrand Storm Ozone System
Ozone generator is mounted on the side of the valve and feeds ozone directly into the filtration tank to oxidize iron and odor
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Adds ozone (pure oxygen) to oxidize contaminants and kill bacteria. Fitler media is backwashed daily
👍 Pros: No chemicals added, effective against bacteria, odors, and iron.
👎 Cons: Short lifespan of ozone, high maintenance, can corrode pipes. Needs to backwash daily to clean the media bed. Ozone needs a dry environment to operate as ozone generators are susceptible to damage in damp environments.
4. Aeration / Filtration Systems - Injects or draws air into the water to oxidize contaminants in the well tank and a contact tank, followed by a backwashing filter.
➣ Types of Aeration / Filtration Systems: Older to Newer systems
A. Venturi Nozzle Aeration / Filtration System: Outdated — can damage the well pumps due to backpressure, reduce water flow, and foul water lines from the injector to the filter system.
Whole House Venturi Zozzle Aeration / Filtration System
➣ Despite the problems and service issues with venturi nozzle aeration systems, there are water treatment and well companies still selling them. Don't buy one!
👍 Pros: Low maintenance, effective for moderate iron & H₂S.
👎 Cons: Will eventually damage submersible well pumps due to high backpressure created by the venturi nozzle. Not ideal for high H₂S or iron bacteria. Plugs water lines with oxidized iron. Short lifespan.
B. Two-Tank Aeration / Filtration System: An air pump injects oxygen into the aeration tank, an aeration contact tank for oxidizing iron, manganese, and odor, and a filtration tank to remove oxidized particulates — effective but very service-intensive.
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| Iron Curtain Two Tank Aeration / Filtration System |
👍 Pros: Moderate maintenance, customizable, effective for moderate iron & H₂S.
👎 Cons: Not ideal for very high H₂S or iron bacteria. Requires cleaning of the contact tank every two years. The filtration tank needs to be rebedded every three years. Valve needs to be disassembled and cleaned every 2-3 years to remove oxidized iron
C. Single-Tank Filtration Systems (Best choice): Simple, low-maintenance, modern metered control valves can be set to run with water usage and/or a day override. They have options to control the air draw time, backwash time, and final rinse. These systems are customizable for problem water issues. 1" to 1-1/4" control valves are available. A properly sized filtration system can be used for irrigation systems to remove iron with tank sizes up to 16x65, which provides water flow rates needed for the number of irrigation zones and larger homes requiring higher flow rates.
Whole House Single Tank Aeration / Backwashing Filtration System
👍 Pros: Low maintenance, customizable, effective for moderate iron & H₂S.
👎 Cons: Not ideal for very high H₂S or removal of iron bacteria.
Key Considerations
- Select a whole-house filtration system designed for your water chemistry and household water usage. Larger filtration tanks allow better contact time to oxidize iron, better filtration, and higher flow rates.
- Ensure your well provides enough flow rate (minimum 10 GPM) and pressure (40–70 psi).
- Work with a trusted water treatment professional or educate yourself to DIY the right way.
Conduct thorough research, find an experienced water treatment professional (not just a salesperson), and always start with a detailed water analysis. If you're a DIY person, this guide will help you understand your options and point you toward the best solution for great water for your home and family.
I wish you Good days and Good water!
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