水草情迷

買 PH 量度器在魚街那一間買比較好?
請問大約是甚麼價錢呢?

量度器.......我覺得唔多準
所以用pH試劑

不錯, 抽水檢驗, 請問大約是甚麼價錢呢?

不過都係岩岩買
唔知準唔準
$25 only

低過 pH 6 便量度不到了

I am using this one. The result is quite different from Sera. I don't know which is right or which is wrong.
The only advantage I can say for sure is that it is economical. Only two drops per 5ml water. It can be used for months or even for year with that price. It provides 18ml in one bottle. And the chart is increment in 0.2.

Anyway, when I increase CO2, it drops, when I decrease CO2, it raise!! I guess if using for reference purpose, it is good enough.

i agree
and then it can use 225 times