There are chemical test kits available (i think) for DO.
a blue drum sliced in half from top to bottom then layed on its side gives you a 100Lt grow bed in HDPE for $20/2= $10 each.better than $52
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| disolved oxygen levels http://byap.backyardmagazines.com/forum/viewtopic.php?f=1&t=743 |
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| Author: | bluefin [ Nov 5th, '06, 14:49 ] |
| Post subject: | disolved oxygen levels |
hi how do i measure disolved oxygen in the water cheaply? Someone told me you can put a couple of drops of methyl bromide in your sample and consult a chart, like ph. Also how does one measure nitrate levels? I went to bunnings today and they have a 110 lt poly containers 300mm deep for $52. When i was in brisbane a couple of months ago there was a guy at the logan city markets selling 220 lt blu drums ( no toxins) for $20 00. Great site i love it peace and love pete |
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| Author: | EllKayBee [ Nov 5th, '06, 15:01 ] |
| Post subject: | Re: disolved oxygen levels |
Hi Pete, welcome to the forum hmmm Methyl bromide, better read this: http://www.deh.gov.au/atmosphere/ozone/ ... index.html Nitrate testers can normally be purchased from aquarium/pet shops as a single test kit ($15 approx) or multiple (ph, ammonia, nitrites, nitrates - $50/$60) Blue drum @ $20 is about normal around Bris - just check what they were used for beforehand and wash before use, can't help on the poly bins tho |
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| Author: | Daniel [ Nov 5th, '06, 15:02 ] |
| Post subject: | |
Im not sure how to measure dissolved oxygen cheaply. I do know that (well i think thats what my teacher said in yr 12 chem) CO2 bubbled through water lowers the ph, and co2 bubbled through i think lime water turns the water white. And high CO2 means low O2........ But i cant think of a way to measure dissolved oxygen cheaply. Others here may have a clue.... |
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| Author: | steve [ Nov 5th, '06, 15:06 ] |
| Post subject: | |
There are chemical test kits available (i think) for DO. a blue drum sliced in half from top to bottom then layed on its side gives you a 100Lt grow bed in HDPE for $20/2= $10 each.better than $52
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| Author: | bluefin [ Nov 5th, '06, 20:39 ] |
| Post subject: | Re: disolved oxygen levels |
hey guys thanks alot for the info im addicted to this site and have been spending hours reading old posts. Caked myself reading the joke forum though. I have an old septic tank buried in the back yard and i was wondering if it would be ok to use after cleaning. I t is about 900 lts and made of concrete. I seached on google and you can get a electronic device for $250.00 that calculates temp as well. I guess i should check out my local "aquariams are us". However i am still collecting old baths for my growbeds and washing machine bowls. peace and subwoofers pete |
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| Author: | steve [ Nov 5th, '06, 21:27 ] |
| Post subject: | |
dude, $250 AU ? the best i've found is around $585 please link to it!
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| Author: | bluefin [ Nov 6th, '06, 04:35 ] |
| Post subject: | Re: disolved oxygen levels |
http://www.pondbiz.com/home/pb1/page_72 ... meter.html is the link to a digital oxygen meter $280us pete |
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| Author: | Food&Fish [ Nov 6th, '06, 04:49 ] |
| Post subject: | |
Thats american isent it steve |
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| Author: | EllKayBee [ Nov 6th, '06, 07:12 ] |
| Post subject: | Re: disolved oxygen levels |
bluefin wrote: I have an old septic tank buried in the back yard and i was wondering if it would be ok to use after cleaning.
Pete, C1 is the concrete guru and should be able to help on sealing etc, Jaymie & Alx should be able to supply references for him 
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| Author: | steve [ Nov 6th, '06, 11:34 ] |
| Post subject: | |
Still.............$280 USD works out to $365 AUD Maybe $35AUD postage You're looking at $400 |
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| Author: | creative1 [ Nov 6th, '06, 11:39 ] |
| Post subject: | |
and duty--Steve Bluefin if u want some info PM me, I'd be glab to help... |
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