Hi fellow bros here,
Just got a new 2 ft (2 tube) white light. Realised that my ph from 5.8 rose to 6.1 within 5 - 10 mins.
Will the lighting really affect the ph?
I am not sure, but a possible reason is that the increase in light resulted in an increase in photosynthesis rate of plants in the tank. Hence, more carbon dioxide dissolved in water is taken in by the plants, there is less carbonic acid in the water (which is caused by dissolving carbon dioxide in water) and the water is less acidic, thus pH increases.
My PH rose about the same amount when my lights are on too so i guess its probably safe to say the lights does increase the pH by a little.
Yeap agreed with what bro lucas explained and another thing will increase is evaporation
Oh.. Okay.. Thanks for the explanation!
How does evaporation increase the PH? How much water can evaporate in 10 mins?Originally Posted by xconnect.
Last edited by cheetf; 15th May 2012 at 08:02.
Is the PH meter powered by the same socket? If it is connected to the same extension gang switch, do you notice sometimes when you turn on another switch in the same gang, it will cause the readings to fluctuate? I do not know the reason but that is my observation.
No la I mean the light also will increase evaporation by heat not increase ph .
Hahaha, I thought the same as bro cheef.
Enjoying every mins of the process. Happy Shrimping.
I think bro cheetf mis-read the explanation. Lucas was explaining that the plants in the tank could have been actively photosynthesizing when the light was on. This photosynthesizing process would cause the plants to consume more dissolved CO2 in the water and releasing more oxygen, and as a result, causing the dissolved CO2 level (which lowers ph) to be lesser in concentration. Thus, the pH increase.
I have previously tested and witnessed this "natural phenomenon" in my planted shrimp tank.
Shrimps Watching.
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agree with above
CRS - CRazy about Shrimps
- Alan Phang -
You can't explain it simply, you don't understand it (well enough )..." - Albert Einstein
If lighting it on for that few hours unlikely will evaporate that much. Unless there is alot of bubbling apparatus in there
Yup.. sometime off or on the light, the ph reading will jump a bit..
its due to the sine wave of the electical current from the lightset affecting the reading of the ph meter.
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CRS - CRazy about Shrimps
- Alan Phang -
You can't explain it simply, you don't understand it (well enough )..." - Albert Einstein
I understand what Lucas is saying but such a change in 5-10 mins? More likely it's the sine wave affecting the PH meter.
Bro Matt, this will happen only if the tank is heavily planted.
Most shrimps tanks are lightly planted with moss/floating plants/hornwarts
CRS - CRazy about Shrimps
- Alan Phang -
You can't explain it simply, you don't understand it (well enough )..." - Albert Einstein
Yup agree. Cos mine was very heavily planted. Not sure about this bro's case. Anyway, I know nuts about sine wave affecting the PH meter.
To TS: Probably good to get a liquid tester to confirm if still in doubts.
Shrimps Watching.
Voted No.1 as Stress Reliever & Anti-Depressant.
Fine prints: Please learn to keep them alive successfully before applying.
http://shrimpsredefined.wordpress.com/
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