Quote Originally Posted by lguti69 View Post
so can I use septic tabs, which are basically 60ish% cal hypo?
I suspect you can, and in fact might get great results from them. But I'd encourage you to find the MSDS sheets for those, and see what's in them. In the past, cal hypo was almost always sold unblended, but these days manufacturers are adding all sorts of goop. If you can give me the
+ exact product name
+ manufacturer name
+ EPA est. number (from label)
I can probably find that info for you.