I read the thread about photometer for PO4.
I use salifert test kit for PO4,NO3. and they can not be shown the exact
values.... and I heard there is PO4 photometer and think I can know better
the value of PO4 by using it.
I searched the internet and found out there was Hanna company in my
country, and photometer for Nitrate.
http://www.hannainst.com/products/io...-%20HI%2093828
Do you have it? Is it good one?
I wanna know your opinion...thanks...

I use salifert test kit for PO4,NO3. and they can not be shown the exact
values.... and I heard there is PO4 photometer and think I can know better
the value of PO4 by using it.
I searched the internet and found out there was Hanna company in my
country, and photometer for Nitrate.
http://www.hannainst.com/products/io...-%20HI%2093828
Do you have it? Is it good one?
I wanna know your opinion...thanks...

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