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 runaway total alkalinity, consumes excessive gas, cannot cope with heavy ba...

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 controller at all.They are caused by misunderstanding the sy...

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

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.

"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 you stay in the relationship or not. Sometimes infidelity can wake people up in relationships an...

In 1981 amid recession and widespread urban unrest Dave Watson left the building trade to join the West Yorkshire Metropolitan Police. You will be enthralled by his stories which cover every human emotion, from a cancer victim having a breakdown to a young bingo caller falling to his death fleeing a raid from the drugs squad. On the way we meet characters and scenes and events that would be hard to find in the most creative pages of crime fiction: the three pensioners who volunteered to be...

Sent to a remote village to live with their grandmother, twins Claus and Lucas devise physical and mental exercises to render themselves invulnerable to the ongoing horrors of war and living under a totalitarian regime. When their bond is tested, their collective ‘we’ shatters and the boys become isolated in different countries. Lucas is challenged to prove his identity and that of his missing brother, a defector to ‘the other side’.Kristóf’s haunting and unforgettable masterpiece ...

“A haunting, harrowing tale that lingers in the imagination long after you’ve turned the last page.”—Washington Post Book WorldA “fierce and disturbing” (New York Times) tale of twin brothers locked in an agonizing bond during the upheaval and savagery of twentieth century Europe, The Notebook Trilogy comprises three internationally acclaimed novels that confirm Ágota Kristóf as one of the most provocative exponents of new-wave Eu...

Harriet Tubman and four former slaves cross the Delaware River and head South to bring freedom to plantation slaves. Watch Country Ham Jones flee from plantation owners as a home burns in a fire set by slave girl Ebony. See Harriet steal secrets from Confederate Generals as she serves them "pie in disguise." Witness firsthand the Hunley Submarine sinking into the deep. Be at the slave market as several slaves are auctioned to the wicked plantation owners. Feel the frustration of young Emma...

An electrifying novel about the Nazi who reinvented himself, Albert Speer‘Which is the most seductive, truth or fiction?’This is the story of Albert Speer: The protégé. The ‘good Nazi’. The star. The mythmaker.In 1969 Speer, Hitler’s favourite architect and Minister of Armaments and War Production, publishes his memoirs. Rewriting his own past, claiming to have known nothing about the Final Solution, he declares himself ‘co...

An electrifying novel about the Nazi who reinvented himself, Albert Speer‘Which is the most seductive, truth or fiction?’This is the story of Albert Speer: The protégé. The ‘good Nazi’. The star. The mythmaker.In 1969 Speer, Hitler’s favourite architect and Minister of Armaments and War Production, publishes his memoirs. Rewriting his own past, claiming to have known nothing about the Final Solution, he declares himself ‘co...

World-renowned curator Hans Ulrich Obrist for the first time grants a private view of his life, and his journey towards art and artistsWhen Hans Ulrich was six years old, he was knocked down by a speeding car as he was crossing the street. Hospitalized for weeks, a sense of urgency was instilled in him. Enraptured by the healing powers of art from this young age, he began to travel across Europe on night trains, visiting artists’ studios.In a book that is p...