Originally Posted by jd254
so... how come no one ever told me liquid test are unreliable!?!!?!? ok ok.... let's c how much this is gunna cost me...
I use the TetraTest Laborett which is liquid reagent.
Very few times have the tests been obviously erroneous.
Those few times I retested with 15ml of tank water instead of 5ml of tank water and the tests indicated typical results.
I would purchase another liquid reagent test kit of different brand,
Run tests with both kits with 15ml and observe the results*.
Derek has way, way more experience than I but IMHO I would not "haul off and spend a bunch of money" until you have tried the above.
I anticipate that you will find that the results are comparable unless one of the tests kits is old.
* Presume you know this but
1) rinse the test vials twice in tap water shaking vigorously with the caps on.
2) rinse the test vials twice in tank water shaking vigorously with the caps on.
3) fill the vials with 15ml of tank water.
4) shake your reagent bottles vigorously before adding the quantity of reagent specified for 5ml.
5) cap the reagent bottle and the these test vial and shake vigorously.
6) repeat 5) until you have added the quantity of reagent necessary for 15ml.
7) allow the test vials to wait the time period as set forth in the directions in your test kits.
8) observe the results of the tests by comparison of the test vials and your color charts under white incandescent light.