PoolMath and TFP Goal levels

[Eric K.]

I noticed in PoolMath when set to TFP.com goal levels, the TA Goal changes when the source of chlorine is changed between bleach and Tri-chlor, with Tri-chlor having a higher range. This isn't the case with the traditional goal levels. Just curious...why is that?

 

[mknauss]

As trichlor is very acidic, a higher TA is needed to maintain a proper pH.