ORP & 1.010 - 鬧市冰室

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ORP & 1.010

Jeffery21

文章: 8

1 于 2004-11-14 23:18

Dear Folks,

Please help:-
1) Is there any relationship between the salinity and the ORP value?
I have just installed an ORP meter. It's show a figure of 120-130. At this moment I am using 1.010.

2) If this situation sustain then I am consider to install O3 machine. However, I am worry because I have heard that O3 is harmful to human especially children. In this case, please comment if it would be more safety to use a O3 machine with smaller concentration.

Thanks.

文章: 2537

2 于 2004-11-15 23:20

Salinity measures the amount of salt disolved in water, while ORP measures the oxidation-reduction potential of water. As far as I know, salt used for tank water does not affect reduction potential.. It appears to me that they have no relation.

ORP of 120-130 indicate poor quality of tank water. O3 is not as harmful as you may consider. I have been using O3 for 3 years already. I would consider O3 very useful in keeping fish.

Concentration of O3 machine should gear with your tank size. I used 200mg for my 4ft tank and 100mg for my 30inches tank. They can only keep the water quality to an ORP value of 300.

Jeffery21

文章: 8

3 于 2004-11-16 00:04

Thanks LC,

Tonight the ORP value raised to 170, but I am almost sure that I will install an O3 machine.

Is the new "Sander" an good option?

My tank is around 1000L, which model shall I buy?

How shall I set for the ORP Controller? Any special tactics shall I pay attention?

Thanks again.

文章: 2537

4 于 2004-11-16 07:07

I have tried a few different brands of ozonizer in the past. New I am using the old model of Sander. I think they are the best. For the new model, I have no idea.

1000L! What a big tank. How long is your tank?

200mg should be the largest ozonizer available. You may try first. But I'm afraid that even this one cannot push ORP of your tank too high. You may need to buy another one working togehter.

ORP Controller should be set between 350 to 450.

Jeffery21

文章: 8

5 于 2004-11-16 10:41

My tank is 84 x 25 x 30"

I will buy a Sander 200mg soon. I have saw that the output is adjustable, shall I turn it to the maximum or what is the procedure?

Thanks

文章: 2537

6 于 2004-11-16 13:25

Sander has a clear general illustration for installation. You may wish to read this first:

http://www.aqua-sander.de/anlagen/index.en.html

My experience on ozonizer is very limited. We may have discussion on some practical points later on.

Jeffery21

文章: 8

7 于 2004-11-16 14:11

Thanks again LC,

I will review it after work.

文章: 2537

8 于 2004-11-28 21:45

Jeffery21,

Any progress?

Jeffery21

文章: 8

9 于 2004-11-28 22:15

Dear LC,

The ORP value climbs up little by little everyday.

now the reading is 260.

I have heard that for FOT tank the ORP value 300-350 will be good enough.

Any opinion?

文章: 2537

10 于 2004-11-28 22:35

The ORP value of my main tank can only be maintaned at a maximum value of 310, with the 200mg Sander turned on 24 hours at maximum power, although I would ilke it to be 400.

Jeffery21

文章: 8

11 于 2004-11-28 23:12

Dear LC,

Thanks for your prompt reply.

So are you planning to add one more O3 machine? Sounds that the O3 is not exposing to the air even you are turning it to the maximum.

Thanks.

文章: 2537

12 于 2004-11-28 23:32

I do not want to buy another one. 310 is acceptable already.

Another better solution is keep less fish. Ha..ha.

文章: 627

13 于 2004-11-29 00:53

salinity will affect ORP.
1. lower salinity usually comes with lower pH, lower pH = more H+ ion,
while H+ is an oxidizers, because it get electrons as 2H+ + 2e- = H2,
and combines with O2 as O2 + 4H+ + 4e- = 2H2O.
therefore H+ will make the ORP rises.

2. salt is NA+Cl, Cl2 is an oxidizers too. will make the ORP rises too.
am i right?

Jeffery21

文章: 8

14 于 2004-11-29 01:11

Dear P,

Thanks for your valuable information, is that means the ORP value will be rising when I am proceeding the 1.010? and the actual value should be lower?

Dear LC,

Is it correct to turn the O3 machine to maxiumum output? I was teached to turn it to pointing around 2'O clock (around 70%)>

Thanks

文章: 2537

15 于 2004-11-30 07:52

1 I agree that low pH value will increase ORP value. However, the usual fluctuation of salinity in a tank should have no effect on pH, which is buffered by the buffer system of tank water. Whether pH level is significantly lowered at a salinity of 1.010 need further verification. I do not have data on that.

2) I cannot figure out why chloride ion (Cl-) of NaCl can be converted to chorine molecule (Cl2) in a common tank situation.

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