New Hanna phosphate checker

[banditpowdercoat]

Hmmm, sound like I can do a check with my Salfert kit faster LOL

[Delphinus]

I used to have one of the older, more expensive models. I have a couple questions about how it would compare:

1) How easy is it to get the reagent packets open and the reagent added to the glass vial?

2) I realize this would be a pain to find out because of the 3 minute countdown per test thing, but if you take several tests in a row (of different samples), how similar are the readings from test to test?

[trilinearmipmap]

Originally Posted by Delphinus

1) How easy is it to get the reagent packets open and the reagent added to the glass vial?

Very simple. Cut open the top of the packet with scissors. Spread the top open, make a V-shaped bend in the side of the top of the packet, pour the reagent powder down the "V" into the glass vial.

Originally Posted by Delphinus

2) I realize this would be a pain to find out because of the 3 minute countdown per test thing, but if you take several tests in a row (of different samples), how similar are the readings from test to test?

I want to do this but I am swamped with work, travel etc. It is on my list of things to do. I'd also like to make a known standard from potassium phosphate and RO water to test the meter against.

[Delphinus]

Originally Posted by trilinearmipmap

Very simple. Cut open the top of the packet with scissors. Spread the top open, make a V-shaped bend in the side of the top of the packet, pour the reagent powder down the "V" into the glass vial.

Sounds the same then, although hopefully the vial is different with this one. With the one I had the opening was very small and it was tough to get all the powder into the vial without spilling at least some.

I want to do this but I am swamped with work, travel etc. It is on my list of things to do. I'd also like to make a known standard from potassium phosphate and RO water to test the meter against.

That would be very interesting. If you do get around to it I would like to see the results.

[Myka]

I will be interested to hear how this tester compares to a Merck kit. I like my Merck kit, and I find it very easy to use and read. It sounds like this tester is a bit fussy. Thanks for the review!

Originally Posted by banditpowdercoat

Hmmm, sound like I can do a check with my Salfert kit faster LOL

Ya, but your phosphate level (in a reef) should be lower than what the Salifert kit will detect.

[wayner]

Here's a review

http://reefcentral.com/forums/showthread.php?t=1837874

[trilinearmipmap]

OK here are 4 measurements off the same water sample from a freshwater planted tank:

Sample 1: 1.34 ppm
Sample 2: 1.06 ppm
Sample 3: 1.35 ppm
Sample 4: 1.35 ppm

After running sample 2 I realized I had not got all the reagent powder into the reaction vial as some of it spilled. So far it seems that the readings are fairly consistent from one measurement to the next if I through out the one bad measurement. This says nothing about whether the measurements are accurate or not.

Next: to repeat the measurements with a saltwater sample.