Phosphate checker

[Mashkoor]

guys I’m planning on buy the Hanna checker for to measure phosphate in my reef tank ... should I buy phosphate or phosphorus ULR ?
Please advice

 

[KrisReef]

I believe their newest model s
HI774 Phosphate Ultra low Range
I Ihave the old version, and love it even though it meausres phosphorus and you have to convert. YOu get the same reading without calculating. The is another thread on here"

more info here

 

[Jeff Jarry reef]

ULR for sure