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PostPosted: Oct 11th, '17, 14:07 
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I am new in aquaponics and have a little question about nitrite. Is pH condition affecting bactery effectiveness to convert ammonia to nitrat? I read that the most perfect pH for aquaponics is 6.8 - 7.0.


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PostPosted: Oct 11th, '17, 14:56 
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Always appreciate your advice Mr Damage.....thanks again!

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PostPosted: Oct 11th, '17, 14:58 
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.
...
:thumbleft:

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PostPosted: Oct 11th, '17, 15:02 
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I know it's a few posts down the track and I'm taking your thread back around in a circle, sorry Mike, but I haven't had much time to check out the forums over the last few days and only just got around to reading the papers Darren linked to a few posts back.

Quote:
The effect of pH on nitrite toxicity within the natural pH range appears to be minute.
So that's a No on pH reducing the toxic effect of Nitrite on the fish, or the actual level of Nitrite in the water.

Quote:
Temperature, which influences tissue oxygen demand, could also be expected to affect nitrite toxicity. Over a relatively small range (22–30°C), Colt and Tchobanoglous (1976) showed no significant relationship between nitrite toxicity and temperature.

In the study of Huey et al. (1984), channel catfish kept at 30°C in the presence of 0.91 mg/l nitrite-N over a period 24 hours developed methaemoglobin concentrations almost twice as high as those of fish held at 10°C. Huey et al. (1984) also found that the fish kept at 30°C showed a more rapid return to background haemoglobin levels in
the absence of nitrite. A higher amount of oxygen in water at lower temperatures and lower metabolic rates of fish at lower temperatures might render nitrite a less potent
toxin at lower temperatures. However, it is also assumed that lower temperatures reduce the efficiency of detoxification mechanisms (Lewis and Morris, 1986).
From that I think we can draw the conclusion that dramatically reducing the water temp could partially reduce the toxic effect of the Nitrite within the fish, mainly due to more DO available in the water and the slowing down of the fishes metabolism, but the detoxification of Nitrite from the fishes system and the return to normal haemoglobin levels will take much longer. Not only that, it required a 20°C drop in water temp to reduce the toxicity within the fish by 50%.

There was no mention of a reduction in the water temp reducing the actual level of Nitrite in the water, which is what Kiara98 claimed could be achieved.

So again, do you have any other information that demonstrates what you are claiming Kiara98... I’m also waiting, as I’m sure others are, for you to enlighten us as to what the “couple of other things that you can do” to reduce Nitrite levels in the water, actually are... As you have mentioned in a number of your posts, we’re all about sharing information here, so why are you holding out on us?

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PostPosted: Oct 11th, '17, 18:08 
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Oh sorry, didn't think I was holding out on you!

I'm happy to show you how this all works with my system if you'd like?

-K98


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PostPosted: Oct 11th, '17, 18:33 
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Knock yourself out... We're keen, seeing as we are yet to see any pic of these numerous systems you've had/have... Please show us how, other than partial water changes and bio-filtration, we can reduce the amount of Nitrites in a system.

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PostPosted: Oct 11th, '17, 19:00 
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How do I post pics?
Was meaning you could come around to my place and have a look if you'd like. Sounds like you could do with a beer or some whiskey, I've got plenty!

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PostPosted: Oct 11th, '17, 23:40 
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I have used Seachem Primein my quarantine tank. It supposedly binds nitrite to make it less toxic. It did seem to work in a nitrite emergency one time, even though the nitrite test still showed nuclear purple after using Prime.

But since I learned how to properly use salt I have not used Prime for nitrite issues.

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PostPosted: Oct 13th, '17, 00:50 
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Be careful if nitrites are in purple. That is dangerous!

-K98


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PostPosted: Oct 13th, '17, 17:41 
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Kiara98 wrote:
How do I post pics?
Mr Damage wrote:
(a). In the "Quick Reply" section immediately below the last post, click the "Full Editor" button.

(b). In the "Upload attachment" section, click the "Browse" button. It should open your "My Pictures" folder, or similar, wherever you store your pics on your PC.

(c). Select the picture you want to upload by double clicking it (max pic size of 800 x 600 is recommended). The picture details should show in the field next to the Browse button you clicked.

(d). Click the "Add the file" button.

(e). When you've finished your text and uploading pics, click the "Preview" button to see how it all looks, if all good, click "Submit"

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PostPosted: Oct 13th, '17, 17:56 
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Kiara98 wrote:
Was meaning you could come around to my place and have a look if you'd like.
Just an explanation of these other methods of reducing Nitrite levels would suffice. Most of us are pretty cluey around here, with the aid of a few pics I'm sure we'll get it without actually having to see your system/s in person.

Quote:
Sounds like you could do with a beer or some whiskey, I've got plenty!
Thanks for the offer, but I've got enough mates already and it's proving increasingly difficult finding time to arrange a catch up and a beer with most of them... As it is I'm still at work at this time on a Friday night... There's that and the fact that I thought Freo would be more blunts than beers.



Cheers!

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PostPosted: Oct 14th, '17, 07:40 
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Ah Hayden - I reckon you should catch up with Kiara.
couple of whiskeys and all that.

Maybe we should have a member vote....


Kiara - post instructions here > viewforum.php?f=4
top two threads plus some other info.

sure many interstate and overseas members would love to see some photos of your setup.

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PostPosted: Oct 14th, '17, 15:59 
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I'm off to Oktoberfest, so I hereby appoint you my proxy Darren... Grab your Rizla's, it's off to Freakmantle for you.

Let us know how it goes, if we haven't heard from you by Monday we'll know Freakmantle's gotchya!... We'll don our Greenpeace or Che Guevara shirts and come looking for ya!

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PostPosted: Oct 14th, '17, 17:09 
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You are not very nice people.
Thanks for ruining my weekend.

-K98


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PostPosted: Oct 14th, '17, 22:41 
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Mr Damage, running a hydroponic shop, no wonder you have so many friends to have 'beers' with...
Curious sense of humour guys... Beer and Whisky shouldn't be laughed at...

Klara, please excuse the boys, it's just that these guys have a wealth of experience and like to go with what they have learned from that experience. We all know that there are some basic AP rules however there is a lot of grey, like you I like my sump but also run a pist system also, both essentially give me the same results, temperature fluctuations being the main difference. I never have nitrates in either of my systems I have a low pH in winter, 6ish and a high pH in summer ,8ish due to our high pH scheme water. I grow seasonal veggies so don't know if pH makes a difference with nitrate uptake like minerals do. I'd go with whatever a trade certified horticulturist says. ;)
But, how about those pics of your system sometime?

Now, I'm going for a beer.

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