Hanna Nitrate + Phosphate Meter

[Spectre2006]

Just ordered these plus reagents for the Phosphate meter, anyone have experience with these, the local lfs said they use the phosphate meter and its very reliable.

Ordered Neptune Apex Controller, forgot to add the PM2 box, salinity probe, upgraded the ph probe and orp probe.

[Randy Holmes-Farley]

Which Hanna Phosphate meter?

[Spectre2006]

Phosphate Meter

http://www.drsfostersmith.com/product/prod_display.cfm?c=3578+4416+23791&pcatid=23791

Nitrate Meter

http://www.drsfostersmith.com/product/prod_display.cfm?c=3578+4416+23792&pcatid=23792

[Spectre2006]

just checked the website, the phosphate meter is on backorder now till 3/12. I called them to check if my order was filled they said yes. :) and I should have it couple days.

[sponger0]

I use the Hanna Checker for phos and love it. Easy to use

[Randy Holmes-Farley]

Bear in mind that the one you selected is not their lowest range reading unit, and it has uncertainty of +/- 0.04 ppm. So if the real value is 0.04 ppm, you can get readings anywhere from 0.00 to 0.08 ppm and it will be within its accuracy specifications.

[Spectre2006]

Bear in mind that the one you selected is not their lowest range reading unit, and it has uncertainty of +/- 0.04 ppm. So if the real value is 0.04 ppm, you can get readings anywhere from 0.00 to 0.08 ppm and it will be within its accuracy specifications.

Thanx, the ultra low range is nice too, its about 50 bucks, since I'm new I figure my phosphates are'nt running that low in the ultra range. I'll supplement later with the ultra low range monitor.

http://www.saltcells.com/phosphorus-meter-checker-ultra-range000-ppmmgl-p-1129.html

[Randy Holmes-Farley]

Well, don't let the name fool you. Ultra low is a marketing term. The uncertainly of the higher one makes it not very useful for most reefers, IMO.

[Spectre2006]

Well, don't let the name fool you. Ultra low is a marketing term. The uncertainly of the higher one makes it not very useful for most reefers, IMO.


Which one do you use for yourself?

[toddmartin]

I remember reading that the nitrate photometer (HI 93728) is not suitable for saltwater use, if that's your intention. It may be worth checking...

[Randy Holmes-Farley]

I don't currently use either of them, but if I did, I'd elect the 736:

http://www.hannainst.com/usa/prods2.cfm?id=045001&ProdCode=HI%20736

I'm not big on measuring such things as opposed to watching the tank itself, but I've also initiated a discussion with Hanna to try to understand if the high levels of silicate that I dose would make low phosphorus levels potentially inaccurate since silicate is a known interferent with the method the meter uses for phosphate.

[Spectre2006]

I remember reading that the nitrate photometer (HI 93728) is not suitable for saltwater use, if that's your intention. It may be worth checking...

your right, chloride causes interference at parts greater then 100mg/l... seawater has 35g/l.

thankyou
Chris

[Spectre2006]

just called them and canceled the whole order, they were excellent about it, you guys saved me 500... :)

[Spectre2006]

with the money saved I ended up buying the PM2 and an extra energy bar from neptune plus conductivity probe, and calibration solutions.