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Shane:

You may want to check the water ratio  you are using for the bleach.   
It might be that premixing a milder solution and circulating may be  
just as effective.....for instance, if you are cleaning surfaces, you  
can dillute regular unscented bleach at a ratio of 1/2 tsp. per quart  
of water!  just google it - tons of info out there....
	


On Jun 18, 2009, at 11:11 AM, Shane Pickett wrote:

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> ISEN-ASTC-L is a service of the Association of Science-Technology  
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> We have a smaller water table, and we usually use Bromine tablets to
> serve the purpose of keeping the water at least somewhat sanitary
> throughout the day. We replace the water daily. We will also run  
> bleach
> through the system weekly, for about an hour, to prevent slime/sludge
> build-up in the pipes and hoses.
>
> Generally been working well for us, but if someone's got a better
> approach, I'm interested in hearing what others do, as well. My  
> concern
> has been the bleach-it's slowly, but surely, fading the rich yellow
> surface to a pale yellow. A non-bleaching chemical would be best.
>
> Thanks!
>
> Shane Pickett
> Science Central
>
>
> -----Original Message-----
> From: Informal Science Education Network
> [mailto:[log in to unmask]] On Behalf Of Joshua Larson
> Sent: Thursday, June 18, 2009 11:46 AM
> To: [log in to unmask]
> Subject: How do you treat water in your water exhibits?
>
> ISEN-ASTC-L is a service of the Association of Science-Technology
> Centers Incorporated, a worldwide network of science museums and  
> related
> institutions.
> ********************************************************************** 
> **
> *****
>
> I'm looking for information about how you treat water in your water
> exhibits.
>
>
> Do you use chlorinators to deliver chlorine?
>
> How often do you test the water for chlorine?
>
> Do you use ozonators?
>
> On average, how often do you replace water?
>
> Is there something really important you'd like to share?
>
>
> Thanks!
>
> Josh Larson
>
> Explora
>
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> For information about the Association of Science-Technology Centers  
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> Check out the latest case studies and reviews on ExhibitFiles at  
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