Took a random last wed, temp was right followed all directions and was fired today. specific gravity was 1.000(same as water) cutoff was 1.003 they didnt even test any further same as a pos result.So for all of you counting on quick fix 5.7 you are taking a huge risk.(The test was at quest)I had never had a problem before with it so I dont know what happend. sucks, might have got a bad batch or somthing.It was a split sample test so they are sending the other sample but it cost me 100 dollars and the results will be the same I am sure. If anyone has any info on why this might have happend please let me know