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Topic # 217774 11-Jul-2017 20:02
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Had a quick Google and there are many.

Any reason to avoid or pick one or two in particular?

The tank water to be tested is in West Auckland if that makes any difference.

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Uber Geek
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  Reply # 1819951 11-Jul-2017 22:11
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Unless you have reason to be concerned about contamination, you could put the $ towards dosing it with chlorine at the prescribed dose for drinking water. I can't remember what sized tank we dosed but we dropped 20litres of pool chlorine in to get rid of the funny smell and taste.

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  Reply # 1821277 12-Jul-2017 14:16
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After surviving a dose of giardia, I have used Pour n Go on a yearly basis for general disinfection, especially if there is no filtering.


But if the water smells like something has died in it, then a drain, clean and refill would be in order.


Rats can get stuck, and die, in the gutter and drainpipes. Makes the water taste funny.





My thoughts are no longer my own and is probably representative of our media-controlled government


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Ultimate Geek
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  Reply # 1825757 20-Jul-2017 10:54
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So... that photo on your profile - is that taken after tasting the 'funny' water?



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  Reply # 1825771 20-Jul-2017 11:15
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Watercare in Auckland have a commercial test lab.  You could try them.


If I owned a rain water tank I would be really sure that the lid was very securely closed.


Our farm had a 7m high maize silo (finish fibreglass hopper with steel framework/ladder).  Possums could climb up there.  They have no problem climbing up any water tank and if they have been poisoned (ditto rats and mice) they are attracted to dark places and/or water.


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Ultimate Geek
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  Reply # 1825849 20-Jul-2017 13:01
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I find yearly water tests a useful pointer as to what we're doing right (or wrong) with our system.
Noticed things like there's been a change in our bore feeds' soluble ferrous Iron with a rise in pH and increasing Chloride (likely salt water intrusion, we're close to the ocean)
It'd get pretty expensive if you're testing to all New Zealand water standards.. we test for the most likely contaminants at a cost of $2-300 per time


We test both our bore water feed and clean water (post treatment) tanks for pH, EColi, Colour, Turbidity, Hardness (mg/l), Alkalinity (mg/l MG) Calcium (mg/l CA) and Chloride (mg/l CL)
Rainwater feed tank inlet basic test for pH, EC, Dissolved Solids etc (pH does rise the longer it's stored in concrete tanks)
We've used several different companies over the years for annual water analysis reports.
I think any IANZ Accredited lab that lists water testing should be able to do the job. We're now using one off this List


One close by is important as readings change with increasing time and warming sample water.
We also regularly do our own clarity & smell tests (heat the water slightly & have a sniff!)

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Ultimate Geek
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  Reply # 1826719 21-Jul-2017 18:39
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Pool chlorine will do.


It's 10grams per 1000 litres.




Of course Watercare make you pay Fixed charge: $647per year for your tank....

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