Automatic Liquid Bleach Dispenser

[drumr]

Just thought I might chime in. I work in an aluminum extrusion factory with an anodizing line, which is basically a water and liquid chemical based line that puts a coating on the aluminum extrusions. In our various tanks we use these small metering pumps to add whatever chemical that the tank gets in precise dosages. We had several old ones lying around so I asked my boss if I could have one and he let me. It's called a Flex-Flo electric metering pump and it is adjustable from about 1 gallon per day all the way up to 74 gallons per day. All I do is stick one of the hoses in the bottle of bleach and the other I have got going into my skimmer. I have it turned down as low as it will go and it will empty a 96 oz bottle of bleach in about 16 hours. I was actually surprised at how well it works. It is very heavy duty (made for sulfuric/hydrochloric acid use). I have used it for the last 2 seasons and have been very pleased with it.....

And best of all....it was free!!

[Amir]

I talked to the manufacturer today regarding the concentration of chlorine as the level goes down. The official answer is that the concentration remains virtually the same until there is only 0.5 gallon of chlorine left - something to do with the way chlorine and water react together. The only issue is if you have very high alkalinity and calcium, it causes excessive scaling on the floats that needs to be cleaned out. The person I talked to lives in CA and has the 8 gallon version and keeps 5-6 ppm concentration with 100 CYA level. By the way they have certification for this unit to be used in public and commercial installations and if the concentration would not have been constant, they could not get this certification. All in all, I think I will order one and give it a try.
Amir

[Amir]

I found the NSF certification
http://www.nsf.org/Certified/Pools/L...0&Standard=050