"MÅNEDENS AKVARIE" Se denne måneds akvarie HER.
pH-værdi
- Henrik_skb
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pH-værdi
Igår gjorde jeg en interessant iagtagelse vedr. pH-værdien i mit akvarie Jeg målte min pH-værdi til 8,35 om eftermiddagen. Om aftenen fik jeg gæster, og da gæsterne var gået igen målte jeg pH-værdi igen. Der var sket et, synes jeg, drastisk fald i pH-værdien. Den var faldet til 7,83. Det skete inden for et kort tidsrum - ca. 5 timer.
Er der andre der har gjort samme iagtagelse.
Jeg antager, at det sker fordi der ledes mere CO2 ud i rummet som så optages i vandet. Er det muligt at faldet sker fordi min Redox-værdi er for lille????
Er der andre der har gjort samme iagtagelse.
Jeg antager, at det sker fordi der ledes mere CO2 ud i rummet som så optages i vandet. Er det muligt at faldet sker fordi min Redox-værdi er for lille????
- Brian
- Æresmedlem
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Det er korrekt at en højere CO2 værdi i lokalet baljen står i vil resultere i en lavere pH værdi.
Hvis du vil læse lidt om det kan jeg godt finde links til et par engelske rigtig gode artikler om pH mm ?
Hvis du vil læse lidt om det kan jeg godt finde links til et par engelske rigtig gode artikler om pH mm ?
Mvh
Brian
Startede saltvand i 2001, startede forummet i maj 2004, solgte 1300 liters baljen i 2009-10 og venter nu på bedre tid om XX antal år til at starte igen
Brian
- Henrik_skb
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- Brian
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Det ved jeg ikke noget om, altså det med redox. Men hvordan kan du sige at det skulle skyldes lav redox hvis du ikke kan måle den afligevel ?
Nå men du kan læse dig klog på pH i denne artikkel - http://www.advancedaquarist.com/issues/ ... 2/chem.htm
Hvor der også står følgende :
Low pH Due to High Indoor Carbon Dioxide
High indoor carbon dioxide can also apparently lead to low pH problems in many tanks. Respiration by people and pets, the use of un-vented appliances burning natural gas (e.g., ovens and stoves) and the use of CaCO3/CO2 reactors can lead to high indoor carbon dioxide levels. The level of carbon dioxide can easily be more than twice that of exterior air, and this excess can substantially lower the pH. This problem is especially severe in newer, more airtight homes. It is unlikely to be a problem in homes like mine where you can feel the wind blowing around old window frames.
Many aquarists have found that opening a window near the tank can result in a significant rise in pH within a day or two. Unfortunately, those aquarists living in colder climates cannot readily open windows in the winter. Some have found it useful in these situations to run a pipe or tubing from the outside to the air input of a skimmer, where fresh, exterior air is rapidly mixed with the tank water.
Finally, the use of limewater in these situations is also appropriate. In fact, limewater may be more optimally used in this situation because the tank would be less likely to experience the undesirably high pH that sometimes accompanies limewater use. While limewater is the alkalinity supplement most potent at raising pH, other high pH additives would also suffice. Supplements based on carbonate, for example, would be very useful in this situation, while bicarbonate would not be. As a commercial example, the original B-ionic would be better than the newer version. For home brews, washing soda (sodium carbonate) would be better than baking soda (sodium bicarbonate).
Nå men du kan læse dig klog på pH i denne artikkel - http://www.advancedaquarist.com/issues/ ... 2/chem.htm
Hvor der også står følgende :
Low pH Due to High Indoor Carbon Dioxide
High indoor carbon dioxide can also apparently lead to low pH problems in many tanks. Respiration by people and pets, the use of un-vented appliances burning natural gas (e.g., ovens and stoves) and the use of CaCO3/CO2 reactors can lead to high indoor carbon dioxide levels. The level of carbon dioxide can easily be more than twice that of exterior air, and this excess can substantially lower the pH. This problem is especially severe in newer, more airtight homes. It is unlikely to be a problem in homes like mine where you can feel the wind blowing around old window frames.
Many aquarists have found that opening a window near the tank can result in a significant rise in pH within a day or two. Unfortunately, those aquarists living in colder climates cannot readily open windows in the winter. Some have found it useful in these situations to run a pipe or tubing from the outside to the air input of a skimmer, where fresh, exterior air is rapidly mixed with the tank water.
Finally, the use of limewater in these situations is also appropriate. In fact, limewater may be more optimally used in this situation because the tank would be less likely to experience the undesirably high pH that sometimes accompanies limewater use. While limewater is the alkalinity supplement most potent at raising pH, other high pH additives would also suffice. Supplements based on carbonate, for example, would be very useful in this situation, while bicarbonate would not be. As a commercial example, the original B-ionic would be better than the newer version. For home brews, washing soda (sodium carbonate) would be better than baking soda (sodium bicarbonate).
Mvh
Brian
Startede saltvand i 2001, startede forummet i maj 2004, solgte 1300 liters baljen i 2009-10 og venter nu på bedre tid om XX antal år til at starte igen
Brian
- Henrik_skb
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Wicked> jeg målte igen ca. 5 timer efter gæsterne var gået, og der var værdien oppe på 8,3 igen. Det der bekymrer mig er den meget hurtige ændring. Jeg har ingen dyr i endnu da jeg er i opstartsfasen, og jeg er ikke sikker på at eventuelle beboere i akvariet ville tolerere så hurtige udsving i værdierne.
- Henrik_skb
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- Brian
- Æresmedlem
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Jeg faldt lige over endnu en rigtig god artikkel om emnet :
http://reefkeeping.com/issues/2004-09/rhf/index.htm
Håber den kan bruges
http://reefkeeping.com/issues/2004-09/rhf/index.htm
Håber den kan bruges
Mvh
Brian
Startede saltvand i 2001, startede forummet i maj 2004, solgte 1300 liters baljen i 2009-10 og venter nu på bedre tid om XX antal år til at starte igen
Brian