Water filter guides
Helpful guides for clear whole-house filter housings, algae prevention, and choosing a fitted water filter cover.
Start with the basics 6 guides
Water Filter Algae: Causes, Prevention, and Covers
Water filter algae usually shows up as green, brown-green, or dirty-looking buildup inside a clear water filter housing. The common pattern is simple: the housing is clear, the…
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Whole House Water Filter Algae: Why Clear Housings Turn Green
Whole house water filter algae is most common when a clear filter housing is installed where sunlight or strong indirect light reaches the bowl. The filter may look green,…
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Why Is My Water Filter Turning Green or Dirty?
Learn why a clear whole-house water filter turns green or dirty, how sunlight can lead to algae growth, and how a fitted cover can help block light.
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How to Prevent Algae in a Clear Whole House Water Filter Housing
Learn how to prevent green or dirty algae buildup in a clear whole house water filter housing by blocking sunlight with shade or a removable opaque cover.
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Do Clear Water Filter Housings Need to Be Covered?
Learn when a clear whole house water filter housing should be covered, especially if the bowl turns green, dirty, or algae-prone from sunlight exposure.
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Best Way to Block Sunlight From a Whole House Water Filter
The best way to block sunlight from a whole house water filter is a fitted opaque cover that helps keep clear housings from turning green or dirty.
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Explore more answers, including help for GE and Culligan filter housings.
Culligan WH-S200-C Algae Problem: What Causes It and How to Fix It
A Culligan WH-S200-C clear sump can turn green when light reaches the housing. Here is how to reduce the algae problem with maintenance and shade.
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GE GXWH40L Algae Problem: What Causes It and How to Fix It
If your GE GXWH40L clear filter housing keeps turning green, sunlight may be reaching the sump. A fitted cover can help block light.
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Does Sunlight Cause Algae in Whole House Water Filters?
Sunlight can contribute to green growth in clear whole house water filter housings because it reaches damp filter surfaces through the transparent bowl.
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How to Stop Algae Growth in a Clear Water Filter Housing
The practical way to reduce algae in a clear water filter housing is to remove the light source, maintain the cartridge, and keep the housing clean.
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Why Is There Green Algae in My Water Filter?
Green growth in a clear whole house water filter housing usually points to light exposure, moisture, and time. Here is what causes it and how to reduce it.
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More background on sunlight, clear filter housings, and algae prevention.
The Green Machine: Why Your Whole House Water Filter Is Turning Green
A green whole-house water filter is usually caused by algae growing in a clear housing exposed to light. Learn why it happens and how to stop it.
Read guideStop Green or Dirty Algae in Whole House Water Filters
Green or dirty algae grows fast in outdoor whole house water filters. Learn why it happens and how a UV-blocking filter cover helps protect GE and Culligan housings.
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