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Can you post a link to this post? I'm also considering both the Scuba S1 and Seagull Pro.

Understood. My comment was more theoretical from a background in water/wastewater treatment.

Another thing to consider is more Hypochlorous Acid (HOCl) is present when Chlorine reacts with water at lower pH. A higher pH will result in a greater percent of Hypochlorite Ion (OCl¯), which has a lower disinfection ability. In sanitizing water, HOCl is 80-100 times more effective as OCl¯.

I have the latest version from the Apple App Store and my history ported successfully. The only issue I've found is that the PH target defaults to 3.

I have a new cartridge filter enroute to replace my DE filter and a new VS pump when it comes off backorder. I know the cartridge filter is going to have a different inlet/outlet configuration and the height of the filter fittings will change. Currently, my DE filter has a push/pull valve that...

Just curious. What did they quote for the backorder?

CSI and LSI are more influenced by PH, CH, and water temperature. Using your readings from the first post PH 8.5 TA 140 CH 100 CYA 35 your CSI is 0.46. I assumed your pool water temperature was similar to mine in Plano 67.1 degrees F. Lowering your PH to 7.8 would result in a CSI of -0.23 which...

First of all, what test kit are you using? The recommended test kits don't report TA in increments of 5. Here are the TFP recommended test kits. https://www.troublefreepool.com/blog/2019/01/18/test-kits-compared/ Your fill water does not have CYA. My advice is not hyper focus on Langelier...

Yes, you can either use a 2" x 1 1/2" reducing bushing or a 2" x 1 1/2" reducing coupling. Both are common and easy to find at your local big box hardware store. I don't know where you're planning to order the pump from but I read on another thread that there is a long wait on these from the...

This article does a good job "dumbing" down the reason why FC/CYA is so important. Using your pool store results, which shouldn't be trusted, your range of FC would be 8 ppm - 14 ppm and if you ever needed to SLAM you would need to increase and hold that at 42 ppm. It would take roughly 8...

Received my K-1766 today and the pool testing 1,000 ppm. I’m considering adding salt to improve the water feel.

To answer your first question. On the screenshot you provided there is a toggle to turn on SLAM option and the recommended SLAM Target FC will be shown. No additional step needed to use the FC/CYA tool. Generally, your process looks good. Here is a link for the official SLAM process. Don't stop...

I've been chlorinating my pool using liquid chlorine since taking ownership last year. Is there any reason to purchase a salt water test (K-1766) to compliment my K-2006 test kit?

The black dot never disappeared would indicate a low CYA and not high.

Here are my current values: PH=7.8 TA=70 CH=325 CYA=50 FC=9.0 CC=0 Temp=64.8 CSI=-0.08 PoolMath claims my pools CH is out of the ideal range, but I also understand chasing CSI is a mostly a wasted effort because the impacts of over-saturated or under-saturated is a long game. My question is...

A couple of issues I’m experiencing. 1. The app reports no logs when I have almost daily logs saved. 2. I am unable to select temp from the Home Screen to track water temp.

Here are my current values: PH=7.8 TA=80 CH=325 CYA=60 FC=10 CC=0 Temp=53.2 CSI=-0.13 I'm likely overthinking and trying to target a neutral CSI too much, but my question is should I aim to increase my CH to 375-400 since the pool temp is going to continue dropping to give more flexibility in...

I'm looking to replace my pool filter in the spring and I'm trying decide between 60 sf or 80 sf size for my pool. Obviously, pool size is a function of the filter area but what else needs to be considered? I'm pretty much sold on the Pentair Quad DE filter. I currently have a single speed pump...

Yep, I was planning to run 24-7 at lower speeds but have a couple hours of higher speed for adequate filtering. I do have a spill over spa but I assume it would be ok just to spill over during 2ish hour full speed period.

I currently have a 230 volt 2 hp Pentair Challenger pool pump and I'm interested in replacing it since it's nearing the end of its useful life. I assume it's an obvious choice to go with a similar voltage and hp variable speed pump. Is this accurate? If so, would I just set my current pump...

My pool gets a lot of sunlight, so you're probably right about keeping the CYA around 60 and maintaining the FC at 9-10. I assume I can use dichlor/trichlor tabs occasionally to bring the CYA back up. Especially, when we're travelling. Great question about the FC. 8.4 was before I dosed to target 9.

I just checked my fill water and the TA is 90 and CH is 150.

Thanks. I go back and forth between 25ml and 10ml for CH and FC. When I want higher accuracy I go 25ml. Why? Because I'm an engineer and nothing else. :)

New pool owner since July 2023. When I took ownership the CYA (180) and CH (800) were both very high. I assume the previous owner used chlorine pucks and cal hypo to disinfect since the FC was likely maintained at 3, not considering the FC/CYA ratio. I switched to liquid chlorine and have...

Took over the pool from the previous owner and now that the weather is getting a little bit cooler I want to look at water replacement options to reduce my CYA, currently at 120. I can either purchase/rent a submersible pump, use backwash to waste through my DE filter, or fill and use to...

Good morning TFP. New here and looking for help diagnosing and removing buildup around my spa return feature. Any help would be appreciated.