Quote Originally Posted by waterbear
Dichlor has a pH of about 6.9....it might lower the pH a bit but shouldn't have that much of an impact as when compared to trichlor!
No 'might's about it. I've seen it lower it frequently. And, no, the impact is NOT nearly as dramatic as trichlor. If pH is 7.3 or higher, there's no serious reason not to use di-chlor if that's what's on hand. Just TEST!!!!!