水草情迷

那d 校返ph pen 準確的水可以再用嗎?有ph7. 10 . 4 那d
因為魚街d老細講只要找個樽再放在冰箱就可以用到 2-3 個月?
真的嗎?
thx ! 高手們

你可以買支蒸餾水來調支ph 筆 7.0就ok 啦

Nickwong2001:
The calibration solution is a kind of phosphate buffer. It should be stored at low temperature and dark condition to prevent degradation.

Raymok:
pH value of distilled water is not 7.0 wor~~~

一次一包,冰過唔準.

thx 高手們..
早知就買支蒸餾水來調啦..
5元..又平又有得飲.....

香港Ｄ蒸餾水唔係7.0.有時偏酸,有時偏鹼.一包包

thx 高手們...
香港Ｄ蒸餾水唔係7.0
但會差幾多到?

差很少,6.8-7.2左右.

Just some information for DIY buffer solution (pH, conductivity, ORP, DO).

pH:
4.004: 10.12g KHC8H4O4 in 1L distilled water
7.415: 1.179g KH2PO4 + 4.303g Na2HPO4 in 1L distilled water
10.014: 2.092g NaHCO3 + 2.640g Na2CO3 in distilled water

Conductivity:
14.9uS: 0.0001M KCl
1412uS: 0.01M KCl

ORP:
+229mV: 1.408g K4Fe(CN)6.3H2O + 1.0975g K3Fe(CN)6 + 7.4555g KCl in 1L distilled water

DO:
0mg/L: saturated Na2SO3 solution
8.263mg/L: saturated O2 distilled water

All measurement should be made at 25 deg C.

西非利!! 即刻回想到中三時上chem堂教計mole!!

真的多謝Lachesis兄那裡長細講解..令我們又學左唔小野^^
不過講句唔好聽的說話...lachesis兄 唔好嬲
我想真的很小人會diy buffer solution 因為以上的材料都好像幾難找
要準的話又要d材料落得剛剛好..都好像幾難...不過真的多謝你
講比我知原來buffer solution 都可以 diy..唔知lachesis 有無自己
做過呢..

thx 高手們

Haha~~

I work in a testing laboratory, so it is easy for me to make them as well as the fertilizers. Also, I usually test the water quality in the company. So my running cost for the tank is very low.

Finally, I'm also a newbie for aquarium, not 高手...^.^

How about the your diy fertilzers ? What do you think if compare commercial products? Do we also need a lab to diy fertilizers ... Many thanks!

Um~ I'm only using DIY TMG for my cheap cheap tank. Since the chemical formula is available in the web, so it is easy to make it. However, I have not idea about the performance of it as I haven't use commercial TMG before.

Besides, it is also possible to make your DIY ADA fertilizers.(they are too expensive la...) When my second tank is 入伙, I will try to make it.
^.^