- Joined
- Mar 10, 2012
- Location
- Rocky Mountains BC
I played around with this over the weekend. I'm a big fan of the alk and phosphate checkers, so I'd really like this thing to work, but the results are just all over the board. I ran 20 tests, using both RO/DI and distilled water (5 of each) and got very consistent numbers... Here are some of my findings:
Using the 0TDS water with or without reagent A on the first stage of the test makes absolutely no difference to the results (although the reagent has to be in the sample by the last stage). So I guess that just says that reagent A is completely colourless I suppose.
I got consistent results of either 360ppm or 410 ppm (or very close) depending on how many 'drops' of sample I put in. It says to use .1 ml, but it is really difficult to judge exactly .1 ml with the crappy syringe they give ( they say to fill it, then go from say .7 to .6 on the syringe). However, one drop of sample can change the result by 50ppm. That's not really acceptable. I think it should be done in drops from a more accurate source.
So has anyone found a reliable way to use the hanna checker? I'm pretty close to giving up on it, since I'm not really happy with such a discrepancy for 1 drop.
Unrelated to hanna:
I've used the salifert calcium, and found it quite tedious and innacurate too. How is the red sea
Using the 0TDS water with or without reagent A on the first stage of the test makes absolutely no difference to the results (although the reagent has to be in the sample by the last stage). So I guess that just says that reagent A is completely colourless I suppose.
I got consistent results of either 360ppm or 410 ppm (or very close) depending on how many 'drops' of sample I put in. It says to use .1 ml, but it is really difficult to judge exactly .1 ml with the crappy syringe they give ( they say to fill it, then go from say .7 to .6 on the syringe). However, one drop of sample can change the result by 50ppm. That's not really acceptable. I think it should be done in drops from a more accurate source.
So has anyone found a reliable way to use the hanna checker? I'm pretty close to giving up on it, since I'm not really happy with such a discrepancy for 1 drop.
Unrelated to hanna:
I've used the salifert calcium, and found it quite tedious and innacurate too. How is the red sea