近距离海洋水族馆pH

海洋水族馆业余爱好者必须常规监测的许多重要水参数之一是pH。但是，pH到底是多少，盐水水族馆中的水平应该是多少，错误的pH值告诉我们什么，无论如何测试的意义何在？

As we mention in our post titled “Putting Aquarium Water Parameters to the Test,” pH is a measure of the hydrogen ion concentration in your system’s water, using a logarithmic scale that ranges from 0 to 14—with 7 being neutral, readings above 7 being more basic (or more “alkaline”), and readings below 7 being more acidic. The higher the hydrogen ion concentration, the lower the pH.

The scale being logarithmic means that each point on the scale is 10 times more acidic or basic (depending on which direction you move along the scale) than the preceding point. So, a pH of 6 is 10 times more acidic than a pH of 7, while a pH of 5 is 100 times more acidic than 7.

您的水族馆的pH读数应该是什么？

海洋牲畜的理想pH范围在8.2和8.4之间。但是，这并不意味着在此范围之外的阅读引起警报。即使值比理想的值低或更高，要实现稳定的pH值也更重要。

Also, keep in mind that it’s normal for the pH to be slightly higher in the daytime than it is at night, owing to the natural photosynthetic activity of algae in the system. During the day, the algae take up carbon dioxide and produce oxygen, but this process reverses after dark—with the algae taking up oxygen and producing carbon dioxide, which is acidic and tends to lower pH.

是什么导致pH下降？

Natural biological processes in an aquarium system tend to cause the pH to shift downward gradually. There are also several factors that can cause a more rapid—or even precipitous—drop in pH. They include:

• 低碱度：也称为“缓冲能力”，碱度是指在存在酸的情况下抗拒pH下降趋势的能力。当碱度低时，这意味着水中没有足够的缓冲化合物（即碳酸盐和碳酸氢盐）来中和存在的酸。您的碱度水平应保持在8到12 dkh之间。同样，保持稳定的碱度比实现精确的价值更为重要。
• 过度储备/过度喂养：即使您的系统的碱度水平适当高，过量的生物加热也可以快速消耗可用的缓冲液并导致pH下降。
• Neglected maintenance：常规维护的水变化和其他方面有助于导出溶解的废物产品和累积的碎屑，否则将在系统中分解并最终将pH下降。水变化还补充了抵抗这种变化的缓冲化合物。
• Inadequate aeration: Carbon dioxide can build up and cause pH to plummet in systems with inadequate water movement and gas exchange.

我应该多久测试一次水族馆的pH值？

We recommend testing the pH of your water on at least a weekly basis. This is very easily done with a simple liquid test kit or electronic pH probe. If you monitor this parameter on a routine basis, you’ll be more likely to detect a trend in the wrong direction relatively early when it’s easier to correct. That, in turn, will help promote the pH stability that is so critical to coral reef organisms.