水草情迷

經常有文章提到每分鐘輸出Co2幾多泡,又會為了提高水中Co2的含量而提高Co2的輸出量,但是現在坊間有不少Co2溶解器,均表示有100%的溶解度,那是否表示可以不理會kh或ph值,用最底的Co2輸出量,如每分鐘一個泡(或更底),而達到最大的Co2溶解度?
又若果使用Co2溶解器後,發覺水中的Co2含量偏低,是否應該提高Co2的輸出量?因為據我觀察所得,提高Co2的輸出,只會令溶解器(我用的是內有生物球,放在缸內使用的款式)內積存大量氣體,更甚者會因氣體過多,令水位下降而令生物球無法轉動,請問各位有沒有相同問題?又如何解決?請多多指教!!

HI, Woody,

我與你遇到同一情況. 不知道大家是否用同一款溶解器?
我唔想咁快放棄個溶解器, 所以現在逐一個 "factor"嘗試 : 包括加soda粉提高KH值, 改高溶解器之出水口, 只用兩個生物球.

你有冇想及到其他可改變的factor?

Dear woody & Kelvin6666,
In my little opinion, 溶解器 or 溶解器 with 生物球 are "tools" to increase the efficiency for co2 to be disolved which means to provide more chance to let the co2 to contact with water to provide more chance to disolve.
kh and ph have co-relation to affect the co2 can be disolve, ph changes as the results of the change of ph and/or co2.

see see http://www.csd.net/~cgadd/aqua/art_plant_co2chart.htm

For example, before you add co2, kh = 2 and ph = 7.4, therefore the disolved co2 should be 2.4, they are fixed. After you add co2, co2 disolved in water, co2 + h2o = h2co3 (acid) and caurse ph decrease. if you measure the ph = 6.4, then co2 =24.
If you are using ADA soil, both kh and ph are very low, (kh = almost 0, and ph around 5.5, such that co2 disolve is very difficult to be disolved.
Therefore, we add some 梳打粉 to increase the kh,
For example you have ph = 6 and kh =0.5, increase kh to 2, ph will increase to 6.6 and provide more space(buffer) for more co2 to be disolved. if you continue to add co2, and kh then decreased to 6.4, then you have co2 = 24 gar lar understand??
Am I right??

坊間有不少Co2溶解器,均表示有100%的溶解度, they are just advertisement jar mar.

1. 100%的溶解度......只不會將CO2流失....等待溶解在水中...
2. 水中的Co2含量偏低...提高Co2的輸出量.....是其中一個方法....還有加速水流和降低KH值也能提高CO2溶解速度.....加草和加光來提高光合作用令水中含O2提高也可以加速CO2溶解速度呀
3. 提高Co2的輸出,只會令溶解器(我用的是內有生物球,放在缸內使用的款式)內積存大量氣體,更甚者會因氣體過多,令水位下降而令生物球無法轉動.......CO2輸出過大呀

有關第2點 : 降低KH值提高CO2溶解速度 是否 等同 提高CO2溶解度?
另外: 我一向以為提升KH值是提高CO2溶解度. 請問有冇人可以解答一下. Thx.

我一向以為提升KH值是提高CO2溶解度. 請問有冇人可以解答一下. Thx.

see see CO2 / KH / pH table in
http://www.csd.net/~cgadd/aqua/art_plant_co2chart.htm