How low is too low for CH

[Katodude]

So due to a lot of rain and a leak I had my CH is now 220. It is on the low side of recommended, but I keep my pH high and my TA high. pH is about 7.8 or 7.9 and TA is usually 90 - 100. So my CSI is usually in a good range. As long as I keep my CSI around 0 or slightly negative am I ok, or is there a minimum amount of CH that I need.

 

[JoyfulNoise]

Amy minimum CH for non-saturation related issues like foaming would be for a CH well below 50ppm. You’re fine.

 

[HermanTX]

I always shoot for a minimum of 250 (i.e. 10 drops using a 10ml sample).
This is a good article from Taylor

Understanding Calcium Hardness