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topic 14346


A discussion started in 2002 but continuing through 2018


Q. I would like to know if there is anything besides bleach to remove algae formation from inside PVC pipes. We don't want to replace the lines. Di-water flows at about 60 gal/hr through the lines after servicing the rinse tanks. Any suggestion will be appreciated. Thanks.

Reynaldo Arroyo
- Valencia, Calif, U.S.A.


A. Hi Reynaldo,

Whereas I don't have a clue about algae removal, I do wonder why bleach is not working for you... sodium hypochlorite, I mean.

Considering that PVC is a horribly inert material, what about using acids, even 93 percent sulphuric will not affect type l uPVC (at room temp!). Any concentration of HCl and maybe nitric to 60% (going by memory)should devastate your algae.

Doubtless you have researched the 'web' under 'algae'.

freeman newton portrait
Freeman Newton
White Rock, British Columbia, Canada

(It is our sad duty to
advise that Freeman passed away
April 21, 2012. R.I.P. old friend).


A. REVITALIZED WATER is a solution to stop algae growth in the water. Revitalized water showed the following results : Prior to installation of the revitalization device , there was algae formation in the cooling tower and in the water tank. After the installation of the water revitalizer : the algae growth fell back to zero. No biocide at all have been used since the installation and there is no more algae growth in the clean process water.



thumbs up sign Glad to hear it worked, Rudolf. I read on the internet that--

"... processes such as distillation and reverse osmosis result in "dead" Water, which is devoid of life-giving energy. Chemically, Water is considered to be one atom of oxygen bonded to two atoms of Hydrogen. The bond angle between the two hydrogen atoms is known to be variable, depending upon the amount of energy in the molecule. Research has shown that water whose bond angle is 101 degrees is "dead" Water. When Water is distilled, the bond angle expands to 120 degrees upon evaporation, but collapses to 101 degrees upon condensation and is therefore "dead". A bond angle of 103 degrees indicates average Water and 106 degrees is activated, energized Water. The Water Revitalizer, through the process of Spiral Energy in a double helix vortex, restores the natural energy in your Water in the same way as Nature does. This process also removes from the water's "memory" the electromagnetic frequencies of any pollutants that the water has come in contact with.

I am skeptical, in fact I don't believe a single word of it, but if it worked for you . . .

Ted Mooney, Teds signature
Ted Mooney, P.E.
Pine Beach, New Jersey
Striving to live "Aloha"

Sewer Jetter

March 11, 2012

A. Reynaldo, assuming your PVC pipe is over 2" ID or is reasonably free of tight, 90-degree elbows (like you'd use in a cold-water supply line), a sewer jetter attachment for your pressure washer can scrub out and flush away algae and other residue. You can buy a 50-foot jetter attachment that fits most residential machines for under $100.

Paul D. [last name deleted for privacy by Editor]
- Austin, Texas, USA

May 7, 2012

Q. Our drinking water source is bore sunk over 10 years ago.For some time we have the water turning yellowish green(algae) when kept for less than 1 week.We used 1-inch diameter PVC pipes.
What can we use to tackle the algae?

Aloy Idam
- Lagos Nigeria

How to remove fungus from drinking water pipe line

August 29, 2018

Q. recently I started drinking mineral water business we install 1500 Meter 1.5 KM pipe line and complete plant with vessels filters but fungus crossed from the plant and micro filters what can I do? Please give me information how can we control fungus.
Remember we install simple plant not RO plant.

shop employee - KASHMIRE Pakistani control

December 2, 2018

A. Following distillation, the collected water is typically an open system. I.e., the vent of the condenser coils for blow off gasses, non-pressurized collection tank. Drawn water from the tank will therefore be replaced with environmental air. In a lab clean room this is no issue, but any factory is open air and trace particulates, including algae spores, will be drawn into the tank, inadvertently inoculating the water. Trace gasses can be introduced as well, including carbon-dioxide and nitrogen. A carbon finishing filter may introduce additional compounds.
Introduce light, and algae WILL grow! It will embed into the pvc surface. A flush may kill it, but porous bed will remain. Abrasive flush might reduce, but only superficially.
SOLUTION: Replace entire line! Use UV proof, opaque PVC, end-to-end. If taste is not an issue, consider replacing the finishing filter with with a mere micron level filter.

Peter Meizis
former water treatment service employee - Mountain Home, Arkansas, USA

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