WASP - Running the pump

Re: Starting off right

I have read/ heard several times that we should circulate water during the peak times of high heat or sun exposure to ward off algae blooms.

The rationale behind this is the chlorine burns off during times of high UV and you may end up with a layer of water with insufficient chlorine to stop the growth of algae. The thorough circulation of water prevents stratification.
 
Ideally, your pump should run a few times a day, but this isn't a necessary requirement at all. Rather, having it run a sufficient amount of time to keep the pool skimmed, and clear to your satisfaction level. Most importantly to keep FC distributed throughout the pool, particularly in dead, or poorly circulated sub surface regions as opposed to stratified layers. Stratification in reality isn't a cause for concern if a pool is used or circulated daily at all. You will not burn off enough Chlorine in any layer to allow Algae growth, because it simply doesn't work this way.
 
I think it is important to remember that a lot of advice and theories you get from other sites and pool owners are from people who do not understand the FC/CYA relationship. People try to keep their FC around 3-4 with no regard for the amount of stabilizer in their pool and when it is still not enough they come up with their own theories and ideas as to why they have algae. A lot of these theories have good sounding reasoning behind them, the kind of "yeah, that sorta makes sense" reasoning that is enough for most people.

What you find over and over here though is that most of these theories fall flat on their face when put up against the TFPC method. Make sure that you take everyone's theories with a grain of salt until they can offer some compelling reasoning. That includes TFP, where you can find several papers to back up the FC/CYA charts and where that information came from.
 
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