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 Orenda's Advice sometimes Conflicts with Industry Standards, Textbooks and Pool Stores 15.06.2022

00:00 - Intro 01:51 - Not all of our advice conflicts with industry standards and texbooks. We just don't believe in the dogma of range chemistry. 02:56 - What is range chemistry? 04:31 - Water never read the textbook. Just like Jarred. 07:07 - Why are people more concerned with scale than etching? 08:39 - Aggressive water looks good. Just like Jarred. 16:08 - Being blind to the LSI is expensive,...

How to use SPA-500 08.06.2022

00:00 - Intro 00:52 - What is SPA-500? 02:50 - How to use SPA-500 04:41 - Recap 05:51 - Closing the shortest episode we've ever done. Thanks for listening!   ------------------------------------ Connect with Orenda Technologies Website: https://www.orendatech.com Blog: https://blog.orendatech.com YouTube: https://www.youtube.com/user/OrendaTechnologies Facebook: https://www.facebook.com/orendatech...

How to use CE-Clarifier 01.06.2022

00:00 - Intro 00:27 - What is a clarifier? 01:28 - What is chitosan? 04:38 - What does CE-Clarifier do? 06:08 - How to use CE-Clarifier 09:23 - Frequently asked questions 11:49 - Summary. Thanks for listening!   ------------------------------------ Connect with Orenda Technologies Website: https://www.orendatech.com Blog: https://blog.orendatech.com YouTube: https://www.youtube.com/user/OrendaTech...

How to use CV-600 and CV-700 Enzymes 25.05.2022

00:00 - Intro 00:58 - What is an enzyme? 03:28 - Enzymes vs. sunscreen 05:54 - How to use CV-600 and CV-700 08:29 - Enzyme dosing 10:47 - Differences between CV-600 and CV-700 12:44 - FAQs 15:11 - Summary. Thanks for listening!   ------------------------------------ Connect with Orenda Technologies Website: https://www.orendatech.com Blog: https://blog.orendatech.com YouTube: https://www.youtube.c...

How to use SC-1000 Scale & Metal Control 18.05.2022

00:00 - Intro 01:56 - What is a sequestering agent? 05:55 - What is a chelating agent? 08:09 - How to use SC-1000 09:14 - We are not in the stain-removal business. But SC-1000 can help soften and remove scale. 12:49 - SC-1000 considerations to be aware of. First, water temperature matters. 14:27 - Second consideration: SC-1000 wipes out chlorine until it can do its job. 16:32 - SC-1000 is biodegra...

How to use PR-10,000 Phosphate Remover 11.05.2022

00:00 - Intro 00:58 - What is PR-10,000? 01:32 - What does PR-10,000 do in the water? 04:26 - Heavy doses of PR-10,000 are easier when using enzymes, because oils and organics can stick to the dust fallout and make it more difficult to clear the water. 05:31 - How to add PR-10,000 07:07 - Higher doses (special doses) of PR-10,000 10:45 - Frequently Asked Questions 14:57 - Summary. Thanks for liste...

How to do an Orenda Purge, and Why 04.05.2022

00:00 - Intro 01:23 - What is an Orenda purge? It is a deliberately strong initial dose of enzymes and phosphate remover (and sometimes chelant) to reset your water. It gives your water the most reduced chlorine demand possible. 03:58 - The entire purpose of an Orenda Purge is remove chlorine-resistant contaminants.  07:45 - SC-1000 chelates metals and prevents oxidation and staining, but most poo...

How to Adjust Alkalinity 27.04.2022

00:00 - Intro 00:58 - To reduce alkalinity, use acid. But there are a few types of acid. And what, exactly, does acid do? It converts alkalinity into carbonic acid (dissolved CO2). 04:17 - The amount of dissolved CO2 in your water determines the pH. 04:36 - Clarifying "carbonate alkalinity" vs. "total alkalinity".  07:45 - The Orenda App adjusts alkalinity automatically for you when you update the...

Swim Across America (w/ Rob Butcher) 20.04.2022

Swim Across America | Team Orenda: https://www.swimacrossamerica.org/goto/orenda 00:00 - Intro 01:23 -  Introducing Rob Butcher, the CEO of Swim Across America 02:02 - Who is Swim Across America? 2022 is the 35th anniversary of SAA. 05:52 - The boat for the original swim sank, and it's still on the bottom of the Long Island sound. 10:06 - Fighting cancer is personal to Rob. 12:32 - The first Inter...

Spring Cleaning 06.04.2022

00:00 - Intro 02:01 - Two categories to talk about: year-round uncovered pools, and pools that were closed/covered/winterized. 09:57 - What should be done first? Remove debris. 13:32 - What sequence of operations should you follow? In what order? 17:35 - One-stop openings are more challenging, but still doable. 18:13 - Have mercy on your pool company. It's beyond hectic. 24:00 - SC-1000 throws a w...

How to Implement the Orenda Program 30.03.2022

00:00 - Intro 03:12 - What is the Orenda Program? It's a philosophy, not a list of products. 04:45 - The history of Orenda 10:42 - It's never profitable to be reactive. Being proactive is much better. 12:42 - No chemical conflicts 21:05 - No long-term byproducts left behind 26:19 - What is an Orenda pool? What does that mean? 27:54 - Ten Steps to implement the Orenda Program 35:52 - Recap of steps...

What Causes Calcium Hardness to Change? 23.03.2022

00:00 - Intro 01:29 - The amount of calcium carbonate is calcium hardness. How saturated that calcium carbonate is is measured using the LSI. 02:45 - If calcium rises, it's coming from somewhere. If calcium falls, it's going somewhere. 03:21 - What increases calcium hardness? 05:03 - What reduces calcium hardness? 07:02 - Evaporation and accumulation 08:53 - If the calcium seems to move much more...

How Salt Chlorine Generators Actually Work 16.03.2022

00:00 - Intro 01:07 - Giving credit where credit is due 02:25 - Saltwater pools ARE chlorine pools 04:13 - Salt (NaCl) dissolves in water and the sodium (Na) separates from chloride (Cl-). That chloride is what the salt system converts into chlorine 04:43 - What a salt cell is and how it works 08:45 - Electrolysis converts 2Cl into Cl2, and Eric attempts to read through the three chemistry formula...

Preparing for Spring Openings in 2022 02.03.2022

00:00 - Intro 00:59 - What is 2022 going to look like? What can we expect with the supply chain shortages? 05:10 - What can you do NOW to make openings smoother in a few weeks?  08:57 - Most pools with mesh covers (or no covers) will have lower calcium and higher pH than they winterized with. 12:55 - A hard reset in the spring is a very good practice. What can you decide to remove from your water?...

The Power of Standardizing Pool Chemistry and Practices 23.02.2022

00:00 - Intro....by Jarred? 02:35 - What is a Standard Operating Procedure (SOP)? 07:34 - The root of the word "decide". 17:18 - When people do their own thing in a service business, they are incentivized to cover up their mistakes. 21:07 - Collective intelligence 24:00 - Step 1: Gain control of CYA levels. 27:20 - Step 2: Create an LSI floor (foundation) with calcium hardness, and a ceiling with...

Ways to Reduce Employee Turnover 09.02.2022

00:00 - Intro 01:43 - Swimming is an individual sport AND a team sport. Individual athletes racing the clock are part of a bigger team. This translates to pool companies as well. 04:02 - Let's focus on people. Not the job, not the skills, the people. People are always the most important aspect of a business. 04:32 - The benefits of a baseline, such as water chemistry minimums. Standards lead to co...

Organic Staining and Tannins 19.01.2022

00:00 - Intro 01:44 - Drinks made from plants have natural color from Tannins. Wine, coffee, tea, etc. 06:10 - Nothing replaces the importance of physically cleaning organics out of the pool. Leaves, acorns and other droppings will overwhelm chlorine if you do not regularly remove them. 10:25 - Tannins can be soaked out of decaying organics. They either stain the surface or discolor the water, or...

Uneven Carbonation & other Plaster Discoloration | Calcium Issues, pt. 5 05.01.2022

00:00 - Intro 01:49 - Most people mistake this problem for scale. But it's not scale. 05:05 - This is a chemistry issue, not specific to brand of finish or pigment. This is not a cement or pigment failure, it's a water chemistry problem that can be prevented. 06:01 - How this occurs during plaster application, exposure and startup. 15:36 - How this occurs months or years later,  from aggressive wa...

Calcite Crystals | Calcium Issues, pt. 4 29.12.2021

00:00 - Intro 04:18 - Calcite crystals are not the same thing as scale 10:49 - Jarred describes photos of crystals 14:18 - Jarred explains how to prevent crystals, and explains it better than Eric. Well done, Jarred. 25:16 - We know of 4 types of crystals. Each has a different difficulty of removal. 32:35 - Jarred summarizes, and summarizes better than Eric. Now you're just showing off, Jarred.  ...

Calcium Nodules | Calcium Issues, pt. 3 22.12.2021

00:00 - Intro 02:00 - Look up "nodule" on blog.orendatech.com, and you will find articles that show photos of calcium nodules. You can also do an online search of nodules and find plenty of information. 04:32 - This is the Orenda podcast, and we believe you should hear both opinions on nodules.  First, the NPC's position. 08:08 - Now, the onBalance position. 12:42 - Both sides acknowledge nodules...

Carbonate Clouding and Dust | Calcium Issues, pt. 2 15.12.2021

00:00 - Intro 00:36 - Welcome to the team, Ryan Rickaby! 01:20 - Review of calcium hardness (amount of calcium carbonate) vs. LSI (saturation of calcium carbonate) 04:30 - Soda ash clouds the water instantly 12:10 - Sharing Eric's screen (alkalinity equilibrium), which can be found on the Orenda Blog, search for Alkalinity 14:21 - When the pH is high enough, carbonate ions (CO3- -) perfectly match...

What is Scale? | Calcium Issues, pt. 1 08.12.2021

00:00 - Intro 01:57 - Definition of scale: Scale is the hardened deposit of a calcium compound that has precipitated out of solution.  02:30 - Analogy of sugar in a drink. This analogy explains the difference between the saturation of calcium carbonate (LSI), and the amount of calcium carbonate (calcium hardness).  06:33 - Calcium carbonate (CaCO3) is the most common form of scale, by far. But the...

Draining and Diluting a Pool 01.12.2021

00:00 - Intro 01:42 - Dilution is not always the solution. But it can be the most practical answer to get certain chemistry levels reduced. 06:54 - Evaporation will not lead to dilution, because the dissolved solids stayed behind. Things will accumulate because tap water adds more dissolved solids to the water. 07:09 - Dilution is not so much about high Total Dissolved Solids (TDS), it's about wha...

Ways to suppress pH from naturally rising 17.11.2021

00:00 - Intro 02:01 - Recap of Henry's Law of differential pressures. Any gas dissolved in a liquid will equalize with that same gas above the liquid. 04:36 - If you exceed the pH ceiling, the atmosphere will literally push CO2 back into the water. 04:57 - Where does CO2 come from when adding acid? It converts bicarbonate into carbonic acid (dissolved CO2). 07:50 - We don't want bicarbonate ions t...

Water Chemistry Testing: 201 10.11.2021

00:00 - Intro 01:11 - Things can go wrong in water testing, so let's review the common mistakes and interferences. 05:07 - Reagent expiration dates mean nothing if the kit is not stored properly. All test kits have a finite shelf life. 09:10 - Bleaching reagents (very high chlorine) can distort other tests too. 15:08 - Cold water interferes with accuracy too. Warm the sample before testing. 18:48...

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