Eric Knight

Rule Your Pool

Science EN ↓ 195 episodes

Rule Your Pool is a podcast by Orenda Technologies. This show was created for pool owners, operators, and service pros who want the best water quality possible. If you want to know what's really going on with your swimming pool chemistry, this might be the podcast for you. Each week, we'll cover a new topic related to swimming pools, water chemistry, or indoor air quality. With our help, you'll be able to rule your pool without over-treating it with chemicals and wasting money.

Author

Eric Knight

Category

Science

Latest episode

Jun 24, 2026

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Episodes

Why Alkalinity Rises in Pools using CO2 for pH Management 24.06.2026

[00:00] - Intro [01:01] - How acid lowers pH [03:14] - Hypochlorite chlorines [04:20] - How hypochlorites are made [06:20] - Chlorines leave behind muriatic acid in water [07:28] - Excess hydroxides [09:50] - What can be done to limit the alkalinity rise? [12:01] - Closing ______________________________ Connect with us!   Realize your full potential. Watershape University® Water chemistry que...

Pool Chemistry Down Under (w/ David Watson) 10.06.2026

[00:00] - Intro [01:27] - David's background [05:38] - Better Understanding CO2 [10:12] - Runaway TA on CO2 Pools [15:25] - Why CO2 tanks freeze [19:11] - Total Dissolved Solids (TDS) [27:17] - What was the TDS limit pre-2005? [28:28] - Mutual friends with Richard Falk [32:01] - Closing Buy David's book on CO2 for pH management in pools: https://davidwatsonpoolconsulting.com/ _____________________...

Acid Burning Through Alkalinity...and CYA? 03.06.2026

[00:00] - Intro [00:51] - Researching alkalinity since 2016 [05:27] - CYA contributes to TA, so does acid reduce CYA? [07:09] - Acid vs. Bicarbonate Reaction [09:08] - Sodium and Chlorides are Spectator ions [12:10] - Does acid burn through Cyanurate Alkalinity too? [15:04] - What about chlorinated isocyanurates? [17:20] - Closing ______________________________ Connect with us!   Realize your...

Fiberglass Pool Chemistry (w/ Bill Khamis) 20.05.2026

[00:00] - Intro [00:38] - Bill's background [07:27] - Expanding education and manufacturing capabilities [14:44] - Clearance for fiberglass pool installation [17:28] - How to become a fiberglass pool installer [24:03] - Researching fiberglass "chalking" [31:36] - Selflessness [34:09] - Chalking looks like calcium silicate bound to to gelcoat polymers [37:40] - The LSI, and chelating calcium [40:04...

Is the LSI actually an "Index"? 06.05.2026

[00:00] - Intro [01:44] - Wójtowicz Update to the LSI Formula [04:21] - Dr. Langelier's Original Index Formula [05:56] - What water wants vs. What air wants [08:18] - Closing   ______________________________ Connect with us!   Realize your full potential. Watershape University® Water chemistry questions? Orenda® Questions? Comments? Or apply to sponsor the show: ruleyourpool@gmail.com  ...

Service 2211: Essential Water Chemistry is now available on Watershape.org 22.04.2026

[00:00] - Intro [02:38] - S2211 - Unit A, part 2 ______________________________ Connect with us!   Realize your full potential. Watershape University® Water chemistry questions? Orenda® Questions? Comments? Or apply to sponsor the show: ruleyourpool@gmail.com   Facebook: @ruleyourpool YouTube: @rule-your-pool  

Water Chemistry vs. Natural Stone 15.04.2026

[00:00] - Intro [01:00] - What is natural stone? [02:42] - Calcite is a dense form of calcium carbonate [06:24] - Aggressive water seeks calcium, even in natural stone [08:04] - Other natural stones that contain calcium [11:22] - Closing ______________________________ Connect with us!   Realize your full potential. Watershape University® Water chemistry questions? Orenda® Questions? Comments?...

Reverse Osmosis (RO) Filtration (w/ Matt Mueller) 08.04.2026

[00:00] - Intro [01:50] - Matt Mueller's Background [08:49] - Issues that Led to Reverse Osmosis [11:03] - Draining and Refilling Depends on Tap Water Chemistry [12:33] - The RO Process [17:17] - The RO Experience, from a Customer's Perspective [21:34] - Is Dilution the Solution to Pollution? [23:14] - Density Stratification [29:36] - How Low Should You Go? [34:32] - What is Osmosis? [36:09] - Is...

186. NEW COURSE! C4633: Advanced Inflatable Watershape Installation Workshop 01.04.2026

You asked, so we answered.  Thanks to feedback from students, instructors and sponsors like you, we are pleased to announce a  new advanced construction course, addressing an underserved segment of the swimming pool industry. Construction 4633: Advanced Inflatable Watershape Installation Workshop (8) This eight (8) hour course packs in two days worth of information into one action-packed workshop....

Allergic to Chlorine? A Microbiology Lesson (w/ Roy Vore, Ph.D.) 25.03.2026

[00:00] - Intro [01:10] - Degrees of Chlorine Exposure [03:51] - Our Bodies Produce Chlorine [08:16] - Drinking Water is Chlorinated [10:27] - Combined Chlorine and other Disinfection Byproducts (DBPs) [16:07] - Prolonged Exposure to Chloramines and Bacteria [23:28] - Is Swimmer's Ear an RWI? [27:03] - Disinfection Contact Times (CT) and Cleaning Agents [28:13] - Organic and Inorganic Chloramines...

Personalized Pool Chemistry (w/ Keegan Rivera) 18.03.2026

[00:00] - Intro [01:12] - Keegan's Background [03:45] - Using Engineering to Simplify Pool Care Advice [05:43] - The Reality of Algaecides [07:07] - Access to Information has Increased [08:55] - Personalized Calculations for YOUR Pool [10:56] - Common Homeowner Questions [12:31] - Take the Quiz, Order your Kit, and Customize it as Needed [14:22] - PersonalizedPool.com, and the My Pool Plan app [21...

AI: My Unsolicited Opinions 11.03.2026

[00:00] - Intro [00:55] - I remember when AI came out [03:03] - An uncertain future [04:23] - AI recognizes AI [06:24] - Truth and reality are blurred now [07:26] - The Trades are the future [09:07] - Humanity must prevail [10:46] - Mass disruption [12:05] - Automation is already here [14:27] - Closing ______________________________ Connect with us!   Realize your full potential. Watershape U...

Understanding Adjusted Alkalinity 08.03.2026

00:00] - Intro [00:36] - Adjusted Alkalinity on a Pool Store Printout [01:34] - Adjusted Alkalinity = Carbonate Alkalinity [03:10] - Cyanurate and Borate also contribute to Total Alkalinity [04:42] - Increasing CYA increases TA. About 1/3 of CYA is Cyanurate Alkalinity [06:14] - Is Adjusted Alkalinity the "Real" Alkalinity? [07:37] - One Breath Summary ______________________________ Connect with u...

Swim School Chemistry (w/ Olympian Davis Tarwater) 25.02.2026

00:00] - Intro [02:20] - Davis Tarwater's background [08:24] - Water quality challenges [18:20] - Swimmer irritation [24:31] - Embrace the pH rise and plan for it [26:56] - Closing ______________________________ Connect with us!   Realize your full potential. Watershape University® Water chemistry questions? Orenda® Questions? Comments? Or apply to sponsor the show: ruleyourpool@gmail.com &nb...

Dad Mode: Unlocked 29.01.2026

[00:00] - Intro [01:43] - New Baby and 2026 Goals [05:44] - Service 2211 has been recorded, and will soon be online [07:48] - 2026: A Building Year for Watershape U [09:01] - Watershape U = Education + Reinforcement and Networking [12:10] - The new WU Service Track [13:33] - Upcoming WU Classes at Shows [20:20] - Closing [21:27] - Service 2211: Essential Water Chemistry - Unit A, Part 1 [24:49] -...

Winterizing Pools Against Crystals (w/ Rob Romano and Bill Drakeley) 26.12.2025

[00:00] - Intro [00:33] - Pool industry lifers [07:25] - How pools are winterized in the Northeast [11:51] - How cold is too cold to plaster? [16:50] - Calcium chloride in the plaster mix [22:06] - Freeze damage protection [27:40] - Dilution's impact on the LSI during the winter [33:51] - Testing fill water, and smart winterizing [36:10] - Company culture of learning [45:21] - Scale vs. calcium cr...

Protecting Pool Plaster (w/ Jeff Smith) 17.12.2025

______________________________ Connect with us!   Realize your full potential. Watershape University® Water chemistry questions? Orenda® Questions? Comments? Or apply to sponsor the show: ruleyourpool@gmail.com   Facebook: @ruleyourpool YouTube: @rule-your-pool  

Reinforced PVC Membranes (w/ Tony Jordan and Jeremy Heersink) 12.12.2025

[00:00] - Preface - Education Vacation Recap [03:10] - Actual Introduction [09:13] - New WU Class - C3291: Reinforced PVC Membrane Workshop [14:35] - PVC membranes in cold climates [16:33] - Installation and costs [30:46] - Closing ______________________________ Connect with us!   Realize your full potential. Watershape University® Water chemistry questions? Orenda® Questions? Comments? Or ap...

Essential Pool Equipment Taught by the Masters (w/ Rocco Russo) 26.11.2025

[00:00] - Intro [01:12] - Introducing Rocco Russo [06:15] - AI Displacement vs. Tribal Knowledge [08:49] - 2025 Trainer of the Year [20:50] - What to expect from S1311: Essential Pool Equipment - The Core Four [33:44] - Closing   ______________________________ Connect with us!   Realize your full potential. Watershape University® Water chemistry questions? Orenda® Questions? Comments? Or appl...

Tile Mastery (w/ Jimmy Reed) 14.11.2025

[00:00] - Introducing Jimmy Reed [07:58] - Weeks of precise prep work before tile goes in [12:12] - The challenge is the point. [13:46] - The Art and Science of Tile Work [15:23] - C2611: Essential Tile Workshop [18:58] - Closing ______________________________ Connect with us!   Realize your full potential. Watershape University® Water chemistry questions? Orenda® Questions? Comments? Or appl...

Hands-on Plastering Education (w/ Jon Temple) 12.11.2025

[00:00] - Intro [01:32] - Introducing Tempool [04:33] - Common denominator lately: Residue [06:21] - Easily distorted mix ratios [23:22] - Rock-to-Rock Pebble Finish Exposure [24:54] - Standardizing Systems [26:50] - Exposure problems and Hot starts ______________________________ Connect with us!   Realize your full potential. Watershape University® Water chemistry questions? Orenda® Question...

Shotcrete Science (w/ Charles Hanskat, P.E.) 29.10.2025

[00:00] - Introducing Charles Hanskat, P.E. [01:26] - Shotcrete History [06:39] - Shotcrete depends on velocity for compaction [09:44] - Wet mix vs. Dry mix. What's right for you? [11:38] - Water, Cement, and Time [15:39] - Slump [17:58] - Compressive strength [19:46] - Aggregates [21:25] - Standards and Minimums [24:36] - Shrinkage and Cracks [32:10] - Ideal conditions and Curing [39:21] - Weeper...

Social Kick (w/ Bryan Lundquist) 01.10.2025

[00:00] - Introducing Bryan Lundquist [02:15] - Swimming Talk [15:48] - Cloudy water, from a swimmer's perspective [20:53] - Changing expectations of water quality [27:09] - ChloramineConsulting.com [29:33] - Showering before swimming, and not peeing in the pool [36:27] - Swimming in natural water (a lake) [40:24] - Unqualified Pool Advice ______________________________ Connect with us!   Rea...

My statement of purpose. 24.09.2025

[00:00] - Intro [00:58] - To pool professionals. [05:41] - To you, the individual listener. [08:47] - To the industry in general. [11:28] - To homeowners. [18:30] - To me. [21:20] - Upcoming education events. ______________________________ Connect with us!   Realize your full potential. Watershape University® Water chemistry questions? Orenda® Questions? Comments? Or apply to sponsor the show...

Rebirth. 17.09.2025

You asked for more podcasts and great information.  But instead, we brought Eric back. The new email address is ruleyourpool@gmail.com. Show notes optional. ______________________________ Connect with us!   Realize your full potential. Watershape University® Water chemistry questions? Orenda® Questions? Comments? Or apply to sponsor the show: ruleyourpool@gmail.com   Facebook: @ruleyourp...

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