Something said on another thread prompted me to download a pool calculator app. imo, a waste of 5€ as it did not give me any info that I can get free from the internet....

Hi, new to forum hoping for a little help. I have a 10k indoor hotel pool on bromine. For the past year bromine levels were consistently at about 4 ppm. But for past 6...

Hi everyone

In France we have a product, chlor lent , that is large slow dissolving 200g tablets of chlorine. I am sure they are all over the world (?). I am interested...

HI All,

I have run a small hydropool for some years with it's various quirks. Recently I have been given eleven schools, all with various problems, however:
I have just...

Hi, don't know if this is a good way to keep some pre-mixed chlorine granules in water and then have the feeder pump that solution into the pool at regular intervals. 5...

I am finally switching from tabs/powder to liquid.

I finally ran out of 3" tabs(in floating tablet holder) but still have some powder left.

I was wondering if I...

Since I can't measure the CYA I have to estimate it. I'm trying to understand this study:
but I hope that someone can explain it in Sesame Street language so I'll...

Hello, I've recently purchased a property and learning to maintain a pool for the first time.

I have a chlorine dispenser, and it appears to be drawing chlorine from...

Im having issues with this cal-hypo feeder. I have a hard time keeping my chlorine residual above 1ppm, i have vinyl pools from 16k gallons all the up to 30k plaster...

Hello, looking for help with continuous 0 chlorine reading over the past month. Started with a green algae bloom which resolved with triple shocking with liquid...

So, my CYA is high (80-90ppm) and I'm trying a new routine this year to help bring it down.
(in addition to annual end-of-season partial draining. The draining has been...

Hi everyone, I’m hoping I can get some advice as to whether or not I’m on the right track.

This year we have had relentless rain in western NY and I battled with a...

I have been operating my swimming pool at my campground, for the last 37 years.. However, I've noticed in the last 3 or 4 years, the chlorine (granular ca hypochlorite...

Hi everyone
I noticed a bunch of black spots on my vinyl liner so I took a water sample in. All numbers pretty good.
FC 3.14 TC 4.45 ph 7.4 ta 120 ch 135 cya 37 iron 0...

Hi all, I've got a 66,000 litre indoor pool.

I've been using 15% bleach (Sodium Hypochlorite) for a while, but now have found it's currently difficult to buy here in...

Purchased our home four years ago with 30,000 unheated inground pool with the original 20+ yr. old vinyl liner with an automatic cover which we use 3 months out of the...