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CLASSIFIEDS
January 15, 2021
This column appears irregularly throughout the year.
August 2008
August 2008
Ask The Expert Question 3, July 2008
July 2008
Ask The Expert Question 2, July 2008
July 2008
Ask The Expert Question 1, July 2008
July 2008
Whole-house RO system with copper pipes
February 2008
Practical or aesthetic effects of both low or high pH
February 2008
Testing the condition of membranes
February 2008
Hollow fiber MF and UF membrane treatment options
August 2007
Nitrate removal with nanofiltration
August 2007
Ozone concentration in distilled water
August 2007
High iron content in exit stream
June 2007
Testing for tannins
June 2007
Pool salt levels
March 2007
How to test pool salt
March 2007
How often to test
March 2007
TDS and salt levels
March 2007
Health effects from deionized water
July 2005
Declining water level
March 2005
Follow-up: November
February 2005
Well water is too soft
January 2005
MSC or Certification exams
December 2004
water softening equipment
November 2004
ice maker filters
November 2004
ozone
October 2004
hard water
September 2004
Distilled water & plastic; storage tips for bottlers
July 2004
RO choices
June 2004
Blue-green water
June 2004
RO choices
May 2004
Removing TCE
May 2004
Treating humidifier water
April 2004
Pump replacements
April 2004
Filters: Double or nothing
March 2004
Cooler cleaning
March 2004
Peroxide dosing?
February 2004
Pool water silverization
February 2004
RO & UV in Malta
February 2004
Overdrawing requires new valve
January 2004
Coconut and carbon
January 2004
Ozone and food processing
January 2004
Desalination at larger scale
January 2004
Hot and cold of lime softening
August 2003
Bypassing salt?
August 2003
Extending RO membrane life
July 2003
No-salt softening
July 2003
Pool advice
July 2003
Soda ash as a regenerant
July 2003
Journals for `air purification`
July 2003
Home drinking water
July 2003
Under the bamboo tree
May 2003
Principles of softening
April 2003
Two 500-gallon Water Buffalo
February 2003
Silica & RO fouling
February 2003
Determining proper chlorine levels
January 2003
A question of pH
December 2002
POU/POE by the numbers?
December 2002
Drinking water filtration system for a community of 10K
December 2002
Aggressive RO water
October 2002
No fluoride, no RO
October 2002
Extra oomph for spring water?
October 2002
UV & lake water
October 2002
Trolling for poll results
September 2002
Recycling data
September 2002
No fluoride, no RO
August 2002
Torn up over tannins
August 2002
Reducing septic system impacts
July 2002
The long and short of softening
July 2002
Clamp-on water treatment
June 2002
Water software 101
May 2002
Per capita water needs
May 2002
‘Cross into the Blue’ on the cutting edge
April 2002
Iron in my water
April 2002
Water softener comparison
April 2002
Comparison of home water softeners
March 2002
Recycling water from your ACvv
March 2002
Distilled vs. reverse osmosis
February 2002
E. coli & coliform
January 2002
Making money the object
January 2002
What’s the best?
January 2002
Oxygenated bottled water?
October 2001
Well treatments other than chlorine
October 2001
More on RO fouling
September 2001
Revisiting iron in water
August 2001
Dissolved oxygen, health and water
August 2001
Removing microsporidia
July 2001
In search of water efficiency
July 2001
Ultraviolet `sterilizer`
June 2001
Revisiting iron in water
June 2001
Finding the Light
June 2001
Blue or green, copper often the culprit
May 2001
RO fouling in Tanzania
May 2001
Affordable water for the developing world
May 2001
Carbon and chlorine
April 2001
A `Carefree’ response to Expert answer
April 2001
Getting educated on water
April 2001
UV & materials selection
April 2001
Getting started in the Sunshine State
March 2001
Concerning water recycling
February 2001
Softeners and the environment
February 2001
Tracking softener sales
February 2001
Getting started in the Sunshine State
February 2001
Canada: UV & Log Reduction
February 2001
Industrial/Domestic Water Treatment
January 2001
Carbon and Ozone
January 2001
Filtration and Small Systems
January 2001
Sizing a Community Well
January 2001
Conventional vs. recycled water treatment
December 2000
Treating recycled cooling water for bottles and cans
December 2000
Spot-Free Rinse Water for Bus Washer -- 3 Answers
December 2000
Three Questions on Corrosivity: Reluctant Guinea Pigs
November 2000
Three Questions on Corrosivity: Wary of Aluminum
November 2000
Three Questions on Corrosivity: ROs and Copper
November 2000
Science Fair Project #2: How do You Do It?
October 2000
Science Fair Project #1: Getting the Dirt Out
October 2000
Basic Home Water Treatment #1: Scandinavia and UV
September 2000
Basic Home Water Treatment #2: Filtration, etc., in Israel
September 2000
MTBE and Whole House Treatment in Two U.S. Regions: Northeast
August 2000
MTBE and Whole House Treatment in Two U.S. Regions: Midwest
August 2000
Sucking on a Straw
July 2000
Dialysis: Use of Softener with Mixed Bed DI
July 2000
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