Merck DD phosphate test kit question

[trilinearmipmap]

My reagent #2 is running out, it is some unknown dry chemical, rather than pay $45.00 for a small refill container of this chemical I was wondering if anyone knows what it is so I could procure it less expensively.

[Randy Holmes-Farley]

I'm not familiar with that kit. Sorry.

[trilinearmipmap]

OK thanks anyway, hopefully someone out there knows the answer, it is a shame to pay $45.00 for a few grams of chemical which is likely worth pennies.

[pjf]

$45 is almost the cost of the entire DD Merck kit.

You may want to check out the Hach PO-19 kit (www.hach.com). While the initial cost is higher ($76), the replacement powder reagents are $19.

[Ralph ATL]

you have to get the entire refill

[tony varrell]

I am also using this kit and just recieved the same sticker shock. I would like to change to a different test kit. What is the most accurate phosphate test kit on the market. I think this kit is overated and over priced...

[bertoni]

For hobbyist test kits, I've used the Salifert and the Hach. They both seem to be okay, although getting a number is easier with the Hach due to the color wheel.