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We would like to install automatic dosing in our community pool. I'd go so far as to say that if don't install auto dosing then we won't be open next year. I cannot do another summer where I have to check the pool three plus times a day every day (and I don't do it all), and I won't ask anyone...

I run a school pool built in the 1960s. The pool is hand dosed. We use a combo of trichlor tablets in a feeder to give us some continuous addition and 14% sodium hypochlorite for topping it up. I know all about CYA thanks to TFP and am able to manage this combination of chemicals pretty well. I...

I run a well used school pool and have posted on here before. We use a mixture of trichlor pucks and liquid chlorine. Last year the pool ran pretty well. I had to increase the water replacement when we got to higher CYA levels but that worked out okay all things considered. This year, things...

We use trichlor tabs to chlorinate the pool on a daily basis (I wish we didn't but hand dosing is not allowed in a semi-public pool and money is not available for the automatic options). I am required to use tablets with added flocculant to improve the filtering (cryptosporidium control). Last...

The pool I look after has a small crack in the base of the pool about the size and shape of a horseshoe. When the pool is empty, water enters the pool through this crack, so I guess that means that the water table is high. The pool is built part way up a slope - ground rises behind it, and...

I met with a pool company this morning to talk about installing a dosing system with automatic controller (so we can say good bye to the tablets). We never got to talking about different kit and equipment, we got stuck on types of chlorine. Not surprisingly, because I've spent way too much...

I seem to be asking a lot of questions on here lately, and I have another! :oops: I've been running the pool with what I thought was FC of 4ppm. Anyway, it got to the point where the TC was definitely out of the range of the tester (colorimeter), so I started doing a 50% dilution to take...

I just got back from putting the pool to bed and realised that I did both my tests on a 50% dilution sample. I know you can multiple FC by two, but that's not true for pH. Is there a way to work out the true pH from the pH on a 50% dilution sample? I think I read it on here once, but now I...

I have inherited a cupboard full of chemicals from the previous people who ran the pool. Plus I have some 14% sodium hypochlorite left over from last year's attempt to winterize the pool. I know that sodium hypochlorite ages quickly. I was told it was good and fresh when I bought it, but that...

I have a painted pool, and I've brushed all the paint flakes down to one corner of the deep end. One way to get them out is to hook up the vacuum hose to the skimmer and suck them all out, but this involves racing back and forth to empty the pump strainer basket, and to be honest it's a...

I'm thinking of getting a pool cover that doesn't let light through. What effect is this going to have on my chemicals? The cover will on the pool at nights and weekends, but off during the day.

On Friday I got the pool water up to a nice temperature for the first time but the water started to go cloudy. I could still see the deep end, but the water became dull and whitish looking. If I plug my numbers into pool calculator, it says that the water is hugely out of balance. I've been...

Wondering if you can help with this one... When I open up the pump strainer basket, there is a most disturbing gurgling noise and all the water in the sand filter drains away. I'm sure this didn't happen last year. All the piping downstream of the pump is brand new this year. The only old...

We started up our pool last week with a clean fill of water from the mains (pH about 7.5), and the water is nice and clear. But the pH has been over 7.8 for the past three days since I added cal hypo, and doesn't seem to be coming down. We use trichlor tablets in an erosion feeder to...

There's a lot of talk on TFP about total alkalinity, and it's a routine test. The general literature on pools says TA is a buffer and a measure of the resistance of water to pH change. Elsewhere on here and if I recall correctly (I can't pinpoint the exact thread again), it says that TA is...

Every year our community pool gets painted by a group of volunteers, who spend ages emptying water, power washing off the algae and then painting. This year it was done again, and the paint was flaking off literally within days, which did cause some problems when paint flakes got stuck in the...

My local outdoor pool may have problems. We're getting through lots of chlorine (trichlor), the combined chlorine is high, and the pool has a strong chlorine smell. We've gone from 0 CYA (pool had been completely emptied and refilled) to 85+ in about 6 weeks, even with regular dilution...