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Umm.. come to think bout it, if its pH 4, the Ministry of Environment has to be alerted.
A sign of acid rain
Really? Collected out in the open or drained off from the pipes or roof-tops? Where's the location -- at our industrial areas in Jurong?Originally Posted by _Uncle Party_
being the most boliao person in the world, i once collected rain water for the fun of it. that water was collected from a very very heavy rain, and recorded a ph level of 4. imagine the concentration of chemicals picked up in the air, on a slighter rainy day.
i posted this in another forum, and most agreed there's too much junk in our air that rainwater isnt a very safe thing to add to one's tank.
pH 4 is very low.
koah fong
Juggler's tanks
Umm.. come to think bout it, if its pH 4, the Ministry of Environment has to be alerted.
A sign of acid rain
Yippie!! Reptiles and Fishies!
Acid rain is worse... ph 4 is nothing..
Well, well, I really did not expect so much response on this fruit juice thread.
I see lots of information here. Let me comment on some of it.
Acids
Generally, any acids will react with carbonates/bicarbonates in the water reducing the KH and pH.
Ketapang leaves contains tanic acids. Tanic acids will reduce the pH & KH of water. Tea also contains tanic acids (tea are basically leaves too) and will have similar effects.
The citric acids in fruit juices by itself will similarly reduce pH and KH. However, there are many stuff in the juices, including buffers, and the interaction is slightly more complex. Generally, fruit juices are acidic in nature.
Carbon dioxide
Using carbon dioxide is the only way to reduce pH without reducing KH.
pH of pee(urine)
It is interesting that the pH of our urine can range from acidic to alkaline depending on our diet and health conditions. The pH range can be from pH4.5 to 8.
Urine contain high level of urea (similar to ammonia) which is toxic to fishes.
pH of fruit juices
Fruit juices are generally acidic. (NOT ALKALINE!)
Some examples of pH of fruit juices and drinks
Orange juice 4
Apple juice 3.5
lemon juice 2.5
Coca cola 2.5
Tea 6.5
Coffee 5.5
The idea of fruit juices being "alkaline" is probably from a school where they classify some fruit juices as "alkaline-forming". Orange and lemon are among them. (Lemon juice is clearly acidic.) It is not the pH of the food itself but the end products that the food produce after digestion.
pH of rain water
pH of pure rain water is can be as low as 5.6. This is because there is no carbonate contents in the rain water, but high dissolve CO2 as it falls through the atmosphere.
In our modern society, pollutants like NO2 and SO2 are inadvertible due to automobiles and other sources like power generation. NO2 and SO2 turns to HNO3 and H2SO4 when contacted with rain. This has put the pH of rain water to about 5.0-5.5. In urban/industrialised environment, pH of rain can be as low as 4 like _Uncle Party_ mentioned.
BC
Hm....thot 4 is quite acidic...cos every increment of 1 number, it is 10 times more...so, from 7 to 4, it is 1 thousand times more acidic. maybe the test kit is faulty. I don't think they are accurate outside the normal range.
if you can read this, you are too close.
Wow thanks bclee for the detailed analysis.
I'm impressedWell, well, I really did not expect so much response on this fruit juice thread.
I see lots of information here. Let me comment on some of it.
Acids
Generally, any acids will react with carbonates/bicarbonates in the water reducing the KH and pH.
Ketapang leaves contains tanic acids. Tanic acids will reduce the pH & KH of water. Tea also contains tanic acids (tea are basically leaves too) and will have similar effects.
The citric acids in fruit juices by itself will similarly reduce pH and KH. However, there are many stuff in the juices, including buffers, and the interaction is slightly more complex. Generally, fruit juices are acidic in nature.
Carbon dioxide
Using carbon dioxide is the only way to reduce pH without reducing KH.
pH of pee(urine)
It is interesting that the pH of our urine can range from acidic to alkaline depending on our diet and health conditions. The pH range can be from pH4.5 to 8.
Urine contain high level of urea (similar to ammonia) which is toxic to fishes.
pH of fruit juices
Fruit juices are generally acidic. (NOT ALKALINE!)
Some examples of pH of fruit juices and drinks
Orange juice 4
Apple juice 3.5
lemon juice 2.5
Coca cola 2.5
Tea 6.5
Coffee 5.5
The idea of fruit juices being "alkaline" is probably from a school where they classify some fruit juices as "alkaline-forming". Orange and lemon are among them. (Lemon juice is clearly acidic.) It is not the pH of the food itself but the end products that the food produce after digestion.
pH of rain water
pH of pure rain water is can be as low as 5.6. This is because there is no carbonate contents in the rain water, but high dissolve CO2 as it falls through the atmosphere.
In our modern society, pollutants like NO2 and SO2 are inadvertible due to automobiles and other sources like power generation. NO2 and SO2 turns to HNO3 and H2SO4 when contacted with rain. This has put the pH of rain water to about 5.0-5.5. In urban/industrialised environment, pH of rain can be as low as 4 like _Uncle Party_ mentioned.
BC
Any other decent ways to buffer the PH to be lower ? After i change my substrate to be Seachem Onyx sand the PH is 8. Moreover, i got driftwood inside. Previously i was using lapis sand with the same driftwood, the PH is 6-6.5
How to buffer the PH 8 to a much lower PH like 6.5-7 ?
Driftwood will lower pH?
Yea driftwood will lower pH. They release tannins too after all
checking up on some old forums, i actually collected it TWICE before. both times, its from my apartment. i live on the top floor where there's this "balcony" sort of thing, so i put one of those tao huay containers to try. this is in the geylang/mountbatten area.
if i recall, both times was during an afternoon downpour. checkin up on some forum history (couple of years ago), the first time the ph was only 5. i filtered it with activated carbon and added it to my tank the next day. i reported that the fish seemed more robust, but that may have been psychological. hahha...i totally forgot about this, i never remembered having done it.
the 2nd time was when i got a ph of 4, also collected from the loft. i feel like testing it again during the next downpour. i think im developing a morbid facination with rain water...
it may be apt to note that i've been using dennerle and tetra test strips, as well as tetra liquid tests since i began the hobby. i cannot recall now which brand was used at that time.
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