Reading API test results

I did a few searches on reading API test results and it was confirmed on the boards to res through the side (as is in the instructions). But, what's not in the instructions is whether or not to put the vial on the paper. The cylindrical shape of the vial causes shadows which darkens the results significantly.

I also have a seachem kit for alk and ph. I use that for the ph which has a slide rule type of color comparison tool. That matches up with the "hold it next to the test card but not on" API result.

I just want someones experienced .02 on this rather than just assuming I'm in the clear on my params.

Oh btw I'm at the tail end of my cycle and would rather have things be bad now when I have time/lack of livestock and can fix things.

Thanks.

 

I find it quite easy to discern the color by placing the vial against the white area beside the chart under bright light (direct sunlight works best).

Hope this helps.

 

^ +1. I noticed the shadow too if the vile is not pressed to the white background, makes the color look darker. I also look at it under sunlight when possible

 

I find API tests very hard to read. I never could shake the feeling I was guessing.

Once my API ran out, I replaced them with Red Sea (overly complicated IMO) and then replaced those with Salifert.

The Salifert is soooo much easier. With these, you look for a distinct color change (purple to blue for example), not shades of yellow. Then you just check how much solution is left in the syringe.

They also don't have that pesky waiting time API has. It takes me about 1/3 the time to test with Salifert.

WRT the pH - I would not use a liquid test for that. For $20 on eBay you can get a "pH pen". It's digital and you just stick it in the water for instant and specific results. Cheaper and easier than liquid tests.