TF Testkit Drop Size

Dave95602

Gold Supporter
Jan 6, 2024
39
Auburn, Ca
The TF Pro refill we started using about two weeks ago seems to be yielding different, variously smaller drops sizes.

I first noticed it with R-0871, which produced an FC reading more than twice what I had been reading before the switch (no changes in use or chemistry routine), and well above the range suggested by orthotolidine.

I contacted Nate and he acknowledged the issue and sent another R-0871, this one is better but still not producing the fully formed drops I was seeing before the switch.

Several of the other reagent bottles are producing tiny little drops as well. I'm hesitant to act on the results of my testing because I don't know if they are correct.

Wondering if anyone else is seeing something similar, or if I'm over thinking this.
 
If you still have the original bottles, swap the tips for comparison.
 
I had a similar issue - my drops were tiny and shooting out at really fast pace - led me to wrong CL readings (I aimed at 16 based on PoolMath for a SLAM. The test took 80 drops —> 40ppm).

I tried wiping it today as @PoolStored mentioned and I felt the static discharge and now the drops have regular size and regular shape. My tests are now normal, I’m at 13ppm which is exactly what I expected, now bringing it back up to 16ppm for continued SLAM :)

Thanks for the tip!