Different Nitrate readings

[kominato]

Hi..I hav a 6 month, 3 ft fowlr tank with 30kg LR, and using Tetra test kit my NO3 reading is always above 75, but with my recently bought Aquarium pharmaceuticals (purple box) reading was btw 0 to 5. Amazing. My tank is stable and all inhabitants doing fine so far...Any comments or advise....

[Kalib]

Just a guess, I think these 2 way off readings is due to either 1 of the testkits not working properly. Maybe you would want to check if any 1 of the 2 testkits has expired, i ever used an expired no2 testkit and it gave 0 No2 all the way.

My fowlr also has very high no3 readings(can't remember but definitely around 50-75mg/litre) and the inhabitants are doing ok so far. I'm using the Interpet testkit.

[joachimsim]

My A P test kits coincide wiht my Nutrafin...so I think its not a problem

[arcanehacker]

Tetra Nitrate test kit is not accurate.. many have reported giving super high readings. Even after water change.

[FuEl]

Get a salifert..solve all your headaches.

[kominato]

Many thanks...

[blu_surf]

Read the back of the box of your Tetra test kit. You're suppose to divide the result by 4.4 to convert it to mg/l.

[arcanehacker]

Read the back of the box of your Tetra test kit. You're suppose to divide the result by 4.4 to convert it to mg/l.

is the instuctions on the back of the box?!

[blu_surf]

is the instuctions on the back of the box?!

The instructions come in a leaflet form in the box but for some strange reason the instruction regarding dividing the result by 4.4 is at the back of the box.

[Asfur]

It doesn't makes any difference, if it mean/read high in ppm it will be mean high also in mg/l. What you need is to use the reliable test kits, i also have try tetra NO3, but i being told that Sera is better than tetra (ofcourse can't compare with salifert). Don't know for sure is it true or not?.

[arcanehacker]

The instructions come in a leaflet form in the box but for some strange reason the instruction regarding dividing the result by 4.4 is at the back of the box.

now thats one crappy testkit.

[joachimsim]

Can somebody tell me if I using my Ca test kit correctly..

Salifert

The 5 ml syringe..doesn't take into acct the long part of the syring so it will take up more than 3 Ml of water when used for first part.

The 1 ml syringe uses the long plastic tip..which is doesn't take into acct.

Also..when reading do you read at the black piston or the white plastic part after it.?

I did the test and found my Ca to be 360 ppm only after less than 2 mths with 3 hard corals only?

Is this possible?

[blu_surf]

It doesn't makes any difference, if it mean/read high in ppm it will be mean high also in mg/l. What you need is to use the reliable test kits, i also have try tetra NO3, but i being told that Sera is better than tetra (ofcourse can't compare with salifert). Don't know for sure is it true or not?.

Yes, I know ppm=mg/l but I don't think anyone mentioned that the initial result of the Tetra test kit is in ppm.