chlorine level

Hello all! Fine tuning the chemicals for my swim spa, I have two quick questions. 1. I found this old TFP post from 2008: How do I use Chlorine in my Spa or Hot Tub? ..many other posts (and instructions on my chemicals) say to have hot tub TA around 150 ppm. Any thoughts on this? 50 ppm seems...

I have a pentair IC40 on an indoor 12000 gal pool/ 1300 gal spa combo. I run my Intelliflow VSP ~1300 RPM for 6 hr/day on the pool and 4hr/day, with the IC40 set at 11% via the intellicenter app. 11% is the lowest it goes before it starts doing a green blinking light on the output indicator...

I SLAM'ed my pool about a month ago and it's been looking great. I've always read that you should add chlorine to the pool at night so that the sun doesn't burn it off and it can effectively kill the organics. I understand that all of that makes sense when you are trying to get rid of an algae...

Hi! I live in Central Texas, where the sun/uv is intense and hot! Should my FC be stopping by 2.5ppm over the course of 2 hours? Gallons: 1715 Sand filter pump Current chemical levels attached.

I’m struggling this year! Need advice. 21’ above ground pool with vinyl liner Hayward multi-port valve with sand filter my struggle right now is high chlorine levels and not being able to bring them down. I have not been able to do weekly maintenance on the pool all summer because of high...

Hey guys, I recently had our nonfunctioning salt cell replaced and have switched over from chlorine to salt. I am confused about the CYA target. I thought it was a goal of 30-50 CYA for a chlorine pool, but I'm reading now it should be higher for a salt pool? Can someone explain this to me? I...

This is my second year using the TFP app to track and balance my pool's chem levels. Last year I used pucks but due to escalating CYA issues I switched this year to liquid bleach. It has been working great but I want to make sure I'm not adding too much chlorine. Current Levels: FC: 5 pH...

Hi, We are new to the pool game having just moved to a house with a pool... Left for us was a Scuba II Electronic pool tester, that measures Chlorine in mg/l (0.1 to 6.0) and all other measurements in mg/l as well apart from pH obviously.... How does that relate to the logging units of the...

Hi, I'd be curious to hear about everyone's experience with chlorination strategies to figure out what would work best for me. For many years, I've been using trichlor pucks along with calhypo for shock with mixed success. It's been pretty painful to deal with the high levels of CYA and the...

I just tested my water and my FC is 19.5 (CYA is 50). I've had my salt water cell on at 60% all summer and I guess because of the cool weather and not having as much sun (my pool only gets about five hours of sun/day) my FC is creeping up (a lot!). The stupid question - is there anything...

I recently rented a home with a pool, and I’m responsible for maintaining it. When I got here the pool was crystal clear, but I had no concept of how to care for it. The landlord said he would have his handyman come teach me how to take care of it. I didn’t know the pool should be checked and...

Hey all, found this site as a result of googling the issues I've had a with a new (to me) pool. I have absolutely no idea what I'm doing regarding pool stuff, but I recently read through pool school and am trying to get started on the TFP method. Grateful for any help you guys can give me...

Hello, I have learned so much from this website. Thank you all so much. I still do have a conundrum that I am unable to research and see my solution. Wondering if I can get some Ideas. I have a 4K gallon above ground pool. We live in Minnesota and my pool is in direct sun 7 hours a day. I...

I have been having difficulty maintaining a proper chlorine level in my pool this whole summer (has actually been an ongoing issue since 2017 but much worse this year even though I purchased a new pump and filter system last summer, and this pool has been partially drained twice since 2017...