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Thanks for chiming in @mas985. and thanks for bringing him into the conversation @Dirk! I totally get if the heat is 1/16th of peak, then its probably pointless to waste the 70watts to run water through the solar panels. But what happens when the temperature differential is only 1/2 of peak...

I very much appreciate your tough love! Though I am not looking for magical/instagram/DIYer/"I can feel hot water out of the return at slow speeds" scenarios. Your phrasing and tone got me totally cracking up. I usually have the same feeling about what I see/read. We are on the same page. I am...

Wow, Emporia Energy is a really neat product. Thanks for sharing! I am certainly jealous of your all-in rate of $0.1233 per kw. 🤯

Can you explain what you mean by a spot for another temp probe? Are you talking available in your piping, or on the controller? Where do you plug the second temp probe in on your controller? or are you using the temp probes separate from the controller? I haven't had a chance to dive into your...

Dude! You snuck this in while I was replying to the other messages. Excellent write-up! I totally agree, using the air temp on the roof would probably be just as effective as setting RPM based on temp differential. Just two ways of solving the problem. I might argue temp differential would be...

Thanks James. But I want the solar to turn on early in the day, I just don't want the RPM to be running as high. And it would be nice if the RPM was determined by temperature differential so I don't have to manually adjust based on time of year... let alone time of year and time of day (which...

In my mind, that optimal flow rate provided is for summer time during the mid to later half of the day. There is no real benefit to going above that number, but there is a lot of room to play with at lower flows depending on time, season, and weather. It seems pool related equipment is lazy...

I want to control the flow more precisely because of the power consumption from the pump in the mid-morning, cloudy, or spring/late-fall. San Diego, CA charges extreme amounts per kilowatt hour, and I don't believe it is optimal to run at the manufacturer's recommended GPM during those...

Thanks Matthew for the post and code. I'm definitely going to have to look into your code and nodejs-poolController. I just posted today about a desire to have more control over RPMs based on water temperature...

Thanks guys. I already manually set the RPM for solar heating, and change it per season, but it is not conducive to set it manually per day or when weather changes. What I want is the RPM to dynamically change based on temperature differential between input water and output water. There is...

Jandy Iqualink 2.0

In my head this is a simple problem to solve. Why can't Jandy/Pentair/etc have the variable speed pump automatically adjust RPM for solar heating. Or do they already? We already have a supply line temperature probe, I don't see why we can't have a return line temperature probe and set a min/max...

That's awesome. I always come back to thinking about things like wifi relays and custom processes when I'm let down by the functionality in big name automation products.

More often than not :ROFLMAO:

Sooo I was looking into this at some point in the past for a different reason. I didn't want automated valves changing positions at the same time. I wanted one delayed by about 1min and the other not delayed. Never went through with making the modification though. I can't remember the...

all good points. thanks for taking the time to keep chiming in. I like your strategy for pump and percentage. That's similar to what I was doing before (8hrs pump and adjusting percentage based on season/demand), I (and pool service) let the chlorine go below minimum (not the low range of...

That's a nice conservative approach

Interesting point

That sounds like a good idea. Thanks

Excellent info. Based on that chart it looks like with a CYA of 70, you'd need about 9ppm fC to be effective against Algae? And CYA of 30 would need about 3ppm FC to be effective against Algae? Is that how I am seeing it, or is that something else? As for higher CYA = longer cell life (and...

Cool Cool! that is good info! Thanks

Thanks for the recommendation. Not to complicate things, but I had turned down the temperature of the pool to alleviate high pool temp causing excessive algae growth, plus the past 4 days have been cloudy and drizzly, so without heating, the pool dropped to 76 degrees over the past couple weeks...

hahahaha! that last part got me laughing out loud for sure. so an OCLT of 0ppm is possible? I figured during summer with a warm pool there is always something breeding/multiplying/consuming-chlorine. Lastly, I know TFP recommends higher CYA levels for SWCG pools, but I swear I have seen folks...

2 snowballs, check! And I totally get your point about 25ml accuracy for daily measurements in maintenance mode. You are either good at plus or minus 8 or bad at plus or minus 2. For OCLT, maybe 25mL accuracy is better though(?). its essentially either perfectly accurate to the drop, or...

Awesome! I didn't know that! What is the recommended scoop procedure for 25mL sample?

UPDATE: -------------------------------------- On Friday (9/15) the pool was reading 13.5ppm fC at 8am. The SWCG was set to 0%. Then I went out of town. This morning (9/18) the pool was reading 12ppm at 8:30am. So it looks like we should be in the clear. Dropping only ~1.5ppm fC over the...

Wow! what a revelation! I just tested the water with 1, 2, and 3 perfect scoops of the R-0870 DPD powder (shaken for 30 seconds) and 10mL of pool water each, and they all cleared out at exactly 24 drops of R-0871 FAS-DPD Titrating reagent. Dang, here I was trying to be exact because I figured...

Going to do that from here on out. Thanks for all the time you all have spent holding my hand though this! Seriously!

Thank you for clarifying. SLAM level or above, for a given amount of CYA, is unsafe. But up to SLAM is safe. Got it!