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Why ORP Systems Fail - and How to Stop It

by David Watson ...

Why ORP Systems Fail – and How to Stop It is a practical guide to understanding ORP, pH, chlorine, chemistry, hydraulics, and automatic pool control systems in real-world aquatic facilities.For decades, pool operators have been told that ORP is unreliable. Controllers are blamed for unstable readings, overdosing, underdosing, and poor water quality. Yet many of these problems are not caused by the ... Read more

$12.99 USD or Free with Kobo Plus

Why ORP Systems Fail – and How to Stop It is a practical guide to understanding ORP, pH, chlorine, chemistry, hydraulics, and automatic pool control systems in real-world aquatic facilities.For decades, pool operators have been told that ORP is unreliable. Controllers are blamed for unstable readings, overdosing, underdosing, and poor water quality. Yet many of these problems are not caused by the
... Read more
Carbon Dioxide for Pool pH Control

by David Watson ...

Carbon Dioxide for Pool pH Control is a practical field guide for pool technicians, aquatic facility operators, consultants, and maintenance professionals responsible for managing commercial swimming pools and spas.For decades, carbon dioxide has been used as an alternative to mineral acids for pH control. Yet the technology remains surrounded by folklore. Operators are told that CO₂ causes ... Read more

$12.99 USD or Free with Kobo Plus

Carbon Dioxide for Pool pH Control is a practical field guide for pool technicians, aquatic facility operators, consultants, and maintenance professionals responsible for managing commercial swimming pools and spas.For decades, carbon dioxide has been used as an alternative to mineral acids for pH control. Yet the technology remains surrounded by folklore. Operators are told that CO₂ causes
... Read more
I Know Where I'm Going

by David Watson ...

What is life really all about? So many people today feel that their lives have little or no ultimate purpose. The world seems hard and cruel. Life seems terribly cheap.In this short booklet, David Watson explains how we can know God is with us, and experience direction and purpose in our lives. ... Read more

$0.99 USD or Free with Kobo Plus

What is life really all about? So many people today feel that their lives have little or no ultimate purpose. The world seems hard and cruel. Life seems terribly cheap.In this short booklet, David Watson explains how we can know God is with us, and experience direction and purpose in our lives.
... Read more
Adult Lesson Commentary, Spring 2025

The Rise and Fall of a Nation

by John David Watson, Dr. Jerry Medlock, Francisco Barros ...

Series series Bogard Press Spring 2025
The student will learn that whether God's people receive blessings through obedience or punishment from disobedience, God's glory will prevail in the end. ... Read more

$10.50 USD or Free with Kobo Plus

The student will learn that whether God's people receive blessings through obedience or punishment from disobedience, God's glory will prevail in the end.
... Read more
Why ORP Systems Fail - and How to Stop it

by David Watson ...

ORP controllers can overdose a pool to 30 mg/L of chlorine while showing a perfect reading. This book explains exactly why - and how to stop it happening.Oxidation-Reduction Potential control is one of the most widely installed and least understood technologies in recreational water management. Pool professionals learn to calibrate the equipment. Very few learn how ORP actually behaves inside a ... Read more

$9.99 USD

ORP controllers can overdose a pool to 30 mg/L of chlorine while showing a perfect reading. This book explains exactly why - and how to stop it happening.Oxidation-Reduction Potential control is one of the most widely installed and least understood technologies in recreational water management. Pool professionals learn to calibrate the equipment. Very few learn how ORP actually behaves inside a
... Read more
Carbon Dioxide for Pool pH Control

by David Watson ...

CO₂ for Swimming Pool pH Control - Explained ProperlyMost pool operators have heard conflicting things about CO₂ systems.Some call them unreliable. Others say they raise alkalinity. Many simply avoid them.This book cuts through the confusion.This is a practical, field-based guide to understanding, installing, and operating CO₂ systems in real-world swimming pools.Rather than repeating industry ... Read more

$12.99 USD

CO₂ for Swimming Pool pH Control - Explained ProperlyMost pool operators have heard conflicting things about CO₂ systems.Some call them unreliable. Others say they raise alkalinity. Many simply avoid them.This book cuts through the confusion.This is a practical, field-based guide to understanding, installing, and operating CO₂ systems in real-world swimming pools.Rather than repeating industry
... Read more
Maigret and the Tall Woman (Inspector Maigret)

by Georges Simenon ...

Translated by David Watson ...

Series Book 38 - Inspector Maigret
In the lull of late summer, Maigret is told of a woman’s murder—but with no corpse, no missing person, and a dubious source for the tip-off, is there even a case to solve?During Maigret’s memorable first encounter with “La Grande Perche”—the beanpole—she’d stripped naked as he tried to arrest her. Many years later, at the tail end of a muggy summer, she brings him a tip-off about a dead body. ... Read more

$9.99 USD

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In the lull of late summer, Maigret is told of a woman’s murder—but with no corpse, no missing person, and a dubious source for the tip-off, is there even a case to solve?During Maigret’s memorable first encounter with “La Grande Perche”—the beanpole—she’d stripped naked as he tried to arrest her. Many years later, at the tail end of a muggy summer, she brings him a tip-off about a dead body.
... Read more
Cheating Secrets

Through the Eyes of a Private Investigator

by David Watson ...

"Cheating Secrets" has all the information needed for anyone in a relationship that may be suffering from infidelity. Learn what the signs of cheating are and how to identify them, as well as real life stories from individuals who have dealt with cheating. This book talks about how some people heal from the experience of infidelity, the damage it causes, and how to recover from cheating whether ... Read more

$10.99 USD or Free with Kobo Plus

"Cheating Secrets" has all the information needed for anyone in a relationship that may be suffering from infidelity. Learn what the signs of cheating are and how to identify them, as well as real life stories from individuals who have dealt with cheating. This book talks about how some people heal from the experience of infidelity, the damage it causes, and how to recover from cheating whether
... Read more
22 Floors

by David Watson ...

Did it start with whispers in the wind? Was it all Michael's fault? Blame has a time and a place, but now blame is too late and of little consequence. The real aftermath will unfold, and like so many of us who have wrestled with our inner thoughts and felt as though we were clinging on, Michael's soul will unravel from the process of life to the factory farm of reincarnation. It is no battery farm ... Read more

$4.99 USD or Free with Kobo Plus

Did it start with whispers in the wind? Was it all Michael's fault? Blame has a time and a place, but now blame is too late and of little consequence. The real aftermath will unfold, and like so many of us who have wrestled with our inner thoughts and felt as though we were clinging on, Michael's soul will unravel from the process of life to the factory farm of reincarnation. It is no battery farm
... Read more
Out of the Blue

by David Watson ...

For years, PC David Watson was a policeman of the old school. He patrolled the towns and cities of England's north by car and on foot, where a fight against crime lurked around every corner. Until, one day, disaster struck - albeit from an unexpected direction.A near fatal encounter in the Scottish Highlands left the Yorkshire bobby inches away from death and with just about every bone in his body ... Read more

$6.99 USD or Free with Kobo Plus

For years, PC David Watson was a policeman of the old school. He patrolled the towns and cities of England's north by car and on foot, where a fight against crime lurked around every corner. Until, one day, disaster struck - albeit from an unexpected direction.A near fatal encounter in the Scottish Highlands left the Yorkshire bobby inches away from death and with just about every bone in his body
... Read more
Adult Lesson Commentary, Fall 2025

Wisdom Versus Foolishness

by John David Watson, Todd Self, David Butimore ...

Series series Bogard Press Fall 2025
The student will apply godly wisdom to every facet of his daily life. ... Read more

$10.50 USD or Free with Kobo Plus

The student will apply godly wisdom to every facet of his daily life.
... Read more
Adult Lesson Commentary, Summer 2026

Chastisement, Forgiveness, Redemption

by Bro. John David Watson ...

Series series Bogard Press Summer 2026
The student will grow in appreciation of the love, sacrifice and passion of his Savior, the Lord Jesus Christ. ... Read more

$10.50 USD or Free with Kobo Plus

The student will grow in appreciation of the love, sacrifice and passion of his Savior, the Lord Jesus Christ.
... Read more

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Why ORP Systems Fail - and How to Stop It

Carbon Dioxide for Pool pH Control

I Know Where I'm Going

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Why ORP Systems Fail - and How to Stop it

Carbon Dioxide for Pool pH Control

Maigret and the Tall Woman (Inspector Maigret)

Cheating Secrets

22 Floors

Out of the Blue

Adult Lesson Commentary, Fall 2025

Adult Lesson Commentary, Summer 2026

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Available:

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Recommended For You

Top Series in United States

MOOJAG

Inspector Maigret

Bogard Press Fall 2025

Bogard Press Spring 2025

Bogard Press Summer 2026

Routledge Library Editions: Welfare and the State

Digital Ethics Lab Yearbook

Europe@War

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