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

Calcium and LSI in Fiberglass and Vinyl Pools (w/ Tyler Mills) 09.08.2023

00:00 - Introduction 01:29 - pH rise should NOT be caused by cement finishes 05:08 - Is calcium needed in vinyl and fiberglass pools? 07:17 - Fiberglass gel coat degradation and chalking 09:25 - Vinyl liner fading 11:04 - LSI and calcium levels always matter, regardless of pool type   ------------------------------------ Connect with Orenda Technologies Website: https://www.orendatech.com Help Cen...

Green and Yellow (Mustard) Algae (w/ Terry Arko) 26.07.2023

00:00 - Introduction 01:53 - 30,000+ species of algae exist 07:45 - Planktonic and Filimentous algae types 09:48 - Organic slime protects algae 10:43 - Brushing helps prevent algae 13:44 - Why we advise against using algaecide products 14:48 - Why algae can have different colors 16:11 - How to treat a pool with algae 17:58 - How to prevent algae 21:11 - How much chlorine is needed with CYA? 27:17...

Black Algae 19.07.2023

00:00 - Introduction 02-54 - Black Algae is actually cyanobacteria 06:02 - To have black algae, it has to be transmitted from elsewhere 08:24 - Black algae is protected by a non-living organic shield 12:48 - Softening the shield 15:43 - Black algae removal procedure 17:18 - Cleaning up afterward 19:26 - No need to superchlorinate 22:30 - Killing the root of the bacteria 24:31 - How to prevent blac...

Chelating vs. Sequestering, and Chlorinating after SC-1000 04.07.2023

00:00 - Introduction 01:12 - Why SC-1000 reduces free chlorine 02:58 - How to use SC-1000 without zeroing out free chlorine 04:25 - How to chlorinate after SC-1000 05:29 - Sequestering vs. chelating 07:09 - The distinction between metals and minerals 08:06 - Phosphate-based sequestering agents 10:17 - Cold water temperature 11:33 - Use SC-1000 in the spring, not the fall 12:32 - Recap 13:42 - Clos...

Understanding Calcium: the bedrock of water balance 28.06.2023

00:00 - Introduction 01:09 - Previous podcast episodes about calcium 03:08 - Calcium is the bedrock of water balance 05:02 - Quick LSI review 09:50 - Water will balance itself if it has to 11:12 - High alkalinity is more likely to cause scale than high calcium hardness 14:35 - Picking the right calcium hardness level 18:45 - Our thought process behind these numbers 22:46 - What is calcium hardness...

Understanding Bromine (w/ Terry Arko) 21.06.2023

00:00 - Introduction 00:46 - Eric's nostalgia for the bromine smell, and collegiate swimming 04:02 - Halogens create salts 05:29 - Recharging bromide ions into HOBr 06:51 - Chlorine vs. Bromine 09:15 - Bromamines 10:55 - Back to the bromine cycle, it's a two-edged sword 11:44 - Enough sodium bromide can convert a chlorine pool into bromine 16:57 - 3 types of bromine products 21:39 - Trihalomethane...

Chemical Forecasting (w/ Tyler Mills) 14.06.2023

00:00 - Introduction 01:38 - Does your local distributor stock ALL the products you need? 05:56 - Freight minimums and group purchasing 12:28 - How to forecast chemical usage 14:51 - Distributors can forecast better than any of us 17:09 - Seasonal demands 23:00 - Summary. Thanks for listening!   ------------------------------------ Connect with Orenda Technologies Website: https://www.orendatech.c...

Minimalism: Addition by Subtraction 09.06.2023

00:00 - Introduction 02:00 - What is traditional pool care? 04:36 - Pool chemical conflicts 09:08 - Contrast that with Eric's pool on the Orenda program 14:34 - Simplify, and subtract things from the water 17:26 - Success is a choice   ------------------------------------ Connect with Orenda Technologies Website: https://www.orendatech.com Help Center: https://ask.orendatech.com Blog: https://blog...

The Return of the King (w/ Harold Evans) 02.06.2023

00:00 - Introduction 00:59 - Harold's global voyage 04:34 - Why Harold decided it was time to sell Orenda 07:03 - New advisory role 08:16 - Why HASA? 10:30 - Why chlorine and acid prices were increased 12:50 - Quality Control 14:13 - Control the controllables 16:53 - Why the 4x1 returnable model makes sense 19:51 - Education will continue to expand 22:31 - New email address for complaints and feed...

Clean water with a slice of Humble Pie 25.05.2023

00:00 - Introduction 01:39 - Fixer upper 03:23 - Why not just drain the pool and clean it out? 07:44 - Mistakes were made 09:46 - White bucket test...with a stupid, dangerous, distracted mistake 12:42 - Green pool cleanup process 16:06 - Churn it up, then shut it off and wait 16:23 - Quality water needs circulation and filtration 23:41 - Summary. Thanks for listening!   ---------------------------...

Top Ten things Kathryn has learned from Orenda 17.05.2023

00:00 - Introduction 00:19 - Kathryn's background 03:48 - 10. Trade shows can be laid back 06:46 - 9. Paper still matters, but sharing digital marketing is effortless 10:22 - 8. Get training 11:52 - 7. Don't be a splash and dash pool pro 13:57 - 6. Measure your pool 15:37 - 5. Stop abusing trichlor tabs 18:59 - 4. Temperature matters 20:16 - 3. Obey physics, stop fighting them 20:53 - 2. Test and...

Breaking Bad Water 10.05.2023

00:00 - Introduction 02:05 - Bad water 03:20 - Can chlorine handle everything in a pool? 04:21 - Resetting water quality 06:28 - Green pool cleanups with algaecides 08:49 - Algaecides and their byproducts conflict with chlorine 12:25 - The Orenda green pool cleanup procedure 14:19 - Restoring water balance 15:34 - Cyanuric Acid is important for both water quality and water balance 16:41 - Orenda c...

Orenda App 4.0 - Updates, integrations, and the future 04.05.2023

00:00 - Introduction 02:48 - The evolution of our mobile app 04:36 - Cleaning up the code 06:17 - Cross-platform 07:40 - Bugs you have helped us find (and fix) so far 10:15 - Privacy, anonymous survey, and one infuriated app user 15:05 - Integrations with other software 19:34 - The Orenda app only exists because of people like you   ------------------------------------ Connect with Orenda Technolo...

Team Orenda and our integration with HASA (w/Terry Arko) 26.04.2023

00:00 - Introduction 02:01 - Introducing Team Orenda 10:08 - Introducing Terry Arko, from HASA 13:35 - Terry's role at HASA 16:01 - Bob Lowry's Pool Chemistry Training Institute 17:08 - HASA and Orenda's education conflicts in some ways 22:58 - More in common than in conflict 26:56 - Wrap up. Thanks for listening!   ------------------------------------ Connect with Orenda Technologies Website: htt...

New company ownership, same tolerable podcast 29.03.2023

00:00 - Introduction 00:50 - Orenda has been acquired by HASA 01:46 - Who we were, who we are, and who we hope to become 02:37 - How Orenda Started 07:04 - Some dude named Eric "decided" to join the company 13:20 - We still think and act like a family business 15:20 - Harold Evans, the "brilliant chemist" 18:41 - Eric the intern 22:00 - The pivot to education 25:50 - Why Orenda was acquired 29:52...

Understanding Calcium Sulfate Scale Crystals 22.03.2023

00:00 - Introduction 01:29 - How we first discovered crystals in pools 02:51 - What the definition of "scale"? 04:51 - onBalance already knew about calcium sulfate crystals 07:45 - What is calcium sulfate? 09:53 - Calcium sulfate precipitates at a lower pH 12:35 - Where do sulfates come from? 15:16 - How sulfates accumulate in pools 17:11 - How to prevent calcium sulfate scale crystals 19:31 - Sum...

How to Manage Pollen in Pools 15.03.2023

00:00 - Introduction 01:47 - What is pollen? 03:44 - How does pollen spread? 06:21 - Pollen, tannins, and organic staining 07:25 - Spring pollen vs. Fall pollen 08:33 - How does pollen get in swimming pools? 09:10 - How to manage pollen in pools 11:20 - CV-600 and CE-Clarifier are great for managing pollen in water 13:06 - Are there phosphates in pollen? 15:23 - Summary 17:33 - Pollen season and b...

How to Contact Us at Orenda (the Right Way) 08.03.2023

00:00 - Introduction 01:33 - There are a finite number of hours in the workweek 03:10 - Phone help line and emails 07:18 - Voicemail 09:25 - Use our help center, ask.orendatech.com 10:36 - We are not legal expert witnesses, so please don't ask us to be 12:32 - Inbound contact requests 13:38 - If you do have to call us, please be direct 16:19 - Give us time to respond...and we will 16:46 - What a g...

What Water Wants 08.02.2023

00:00 - Introduction 02:11 - We are still relatively unknown, and so is our message 03:53 - We cannot teach water chemistry properly without first understanding water itself 05:08 - The equilibria of both water and air 07:37 - Traditional range chemistry 08:18 - Startup example - stop chasing pH 11:38 - Has range chemistry ever worked? 12:15 - Water doesn't have a voice....or does it? 14:19 - The...

Live from the NESPA Show in Atlantic City 27.01.2023

00:00 - Introduction, and introducing Shaun Mulhall, our Southeast regional manager 00:52 - Introducing Kathryn Varden, our Western regional manager 02:01 - Our top 5 topics on this podcast all have a common theme 05:49 - We got to teach two classes at the NESPA show, and 2 more in Spanish 07:21 - Jarred admits the podcast is actually worthwhile (but he still doesn't listen to it) 09:04 - Please g...

Stop Helicopter Parenting your Pool 04.01.2023

00:00 - Introduction 02:43 - What does "helicopter parenting" mean in regard to a swimming pool? 05:23 - Patience is a virtue in pool care 06:46 - Let physics do their thing 08:14 - Physical thresholds like pH ceiling take time 10:01 - One pool to focus on vs. many 11:27 - Make an informed plan to rule YOUR pool 12:23 - Closing. Thanks for listening!   ------------------------------------ Connect...

How to use the Orenda App 24.12.2022

00:00 - Introduction 01:22 - Exploring the main menu and features of the Orenda App 03:14 - Blogs, procedures and videos are all shareable on the app 03:50 - App settings allows you to select language, units of measurement, and toggle borate on/off 05:48 - How to use the Orenda Calculator 08:05 - Real-time LSI and color codes 08:28 - How the Orenda Calculator dials work 10:01 - How to get chemical...

7/7 - What raises and lowers Phosphates? 21.12.2022

00:00 - Introduction 00:59 - What are phosphates? 02:59 - Where do phosphates come from? 03:09 - Chemically raising phosphates 05:42 - Phosphates in drinking water 08:22 - Environmental factors that introduce phosphates 09:14 - What lowers phosphates in pools? 09:18 - Reverse Osmosis (RO) filtration 10:58 - Rain and snow dilution 11:31 - Phosphate remover products 13:11 - Summary   ---------------...

6/7 - What raises and lowers Combined Chlorine? 14.12.2022

00:00 - Introduction 00:35 - What is combined chlorine? 03:20 - What raises combined chlorine? 04:15 - Nitrogen sources in commercial pools 07:29 - Nitrogen sources in residential pools 08:34 - What lowers combined chlorine? 08:59 - Chemical ways to reduce combined chlorine 12:46 - Mechanical ways to reduce combined chlorine 15:03 - Summary - after nitrogen is oxidized...   -----------------------...

5/7 - What raises and lowers Total Dissolved Solids (TDS)? 07.12.2022

00:00 - Introduction to our new seven-part series 00:30 - What is TDS? 02:39 - Myths about TDS 04:32 - What raises TDS? 06:29 - What lowers TDS? 07:05 - Reverse Osmosis filtration 07:34 - Summary   ------------------------------------ Connect with Orenda Technologies Website: https://www.orendatech.com Help Center: https://ask.orendatech.com Blog: https://blog.orendatech.com YouTube: https://www.y...

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