Hanna Colorimeters

[griss]

A while back, I saw a reference to one or more of these being known to be not so accurate but, now I can't find that thread. Does anyone know which ones these are?

I ask because, other than phosphate, I'm currently using Salifert test kits. But, a long time friend who's out of the hobby gifted me some Hanna Colorimeters last night. He gave me the following :

Alkalinity
pH
Nitrate Low Range
Nitrate High Range
Phosphorus Ultra Low Range

Any input would be appreciated as, I don't want to rely on one of these if they are not accurate. If that's the case, I'll continue using Salifert kits.

 

[griss]

Found a really old thread. It appears from the chatter on that thread, the Phosphate meter is more accurate than the Phosphorus one. No big deal, as I mentioned, I already had the phosphate one.

 

[tommer725]

Found a really old thread. It appears from the chatter on that thread, the Phosphate meter is more accurate than the Phosphorus one. No big deal, as I mentioned, I already had the phosphate one.

Link to the thread? For some reason I thought it was the other way around and Phosphorus ULR was more accurate after the conversion table was used.

 

[discotu]

I use the hanna copper, alk and phos ulr. I have read that the mag colorimeter is the least accurate of the bunch but have no direct experience.

 

[griss]

I use the hanna copper, alk and phos ulr. I have read that the mag colorimeter is the least accurate of the bunch but have no direct experience.

Mag, now, I remember that's what I read as well.

 

[griss]

Link to the thread? For some reason I thought it was the other way around and Phosphorus ULR was more accurate after the conversion table was used.

Might be, here's the thread. I was just skimming it and might have misinterpreted.

 

[Reefing102]

I’ve read mag is the “worst” as far as accuracy but I’ve heard Calcium can be easily messed up but not as bad as mag.