tap water NO3 = 12.5ppm

[weileong]

I am using the Tetra NO3 test kit and the NO3 for my tank water reads 12.5ppm.

So I tested the freshly prepared SW and also 12.5ppm.

Then I went to measured my tap water and it reads also 12.5ppm.

I think something is wrong with the test kit.

Like to ask what brand of NO3 test kits you guys are using?

[hotsoup]

I think u should try other brand cos I had tested tap water and the NO3 was measured @ 0. Try Salifert, a bit on the high price

[CooL_anakin]

Anyone knows where to get a Salifert Test kit around yishun area? The nearest place? Thanks.

[Achilles Tang]

Depending on where you stay, it is possible your water supply has readings of nitrates and phosphates.

If in doubt, get a RO/DI unit!

[simonsee]

i am using sera test kit. so for so good for me. you can try it.

[BarraCudaTM]

I hate to get readings by color matching .. any better kits out there?

[ai[k²]wan]

most of the test kits are color matching ones .. perhaps u want some digital types

[SpiderOne]

... if u find a digital no3 test kit . pls tell me.

[nutx]

I hate to get readings by color matching .. any better kits out there?

I agree with you, esp those reading in Green and blue....me green blind!

[FuEl]

... if u find a digital no3 test kit . pls tell me.

There are digital ones that test for NO3...but those are used in food testing...saw it at one of the AVA branches once... really sophisticated machine...can test for other things too.

[SpiderOne]

How much it cost?? u sure no3?? i have never seen 1 b4.. and i should have.. spending 8 hours a week in a chemical pilot plant.

[FuEl]

How much it cost?? u sure no3?? i have never seen 1 b4.. and i should have.. spending 8 hours a week in a chemical pilot plant.

Hehe...yep..confirm NO3...erm..not sure if can be used in saltwater though...

Maybe you can check with ppl working in the food control dept. from ava?

[weileong]

My company have the digital meter and probe for testing of NO3 ions. However the price you won't like to know and I won't want to pay for it. I don't think we need to get such accurate reading too. Just have a general feel of the NO3 conc like close to 0 ppm, 5ppm, 10ppm. Therefore a chemical test kit would be good enough.

Hanna instruments sells a cheap (ard USD$400) digital colorimeter which still requires adding of chemical for reaction then sensing the color (done by the machine).

I think for most of us just stick with the test kit is good enough.