I get this, but taking too many potassium supps is I'm pretty sure the biggest contributor to why I got gastric ulcers, also due to gastroparesis from Lyme that was building up acid in my stomach too, so be careful w/ that.
Now, I drink a lot of orange juice (high potassium), coconut water, and any juice combo w/ bananas on days w/ coffee enemas, and also generally eat potatoes that day. This seems to really help, otherwise, my heartrate gets erratic which is definitely worrisome. I also do a magnesium salts spray on my skin to just balance out those minerals a little. I prefer OJ to just other things because it also has some calcium. I get none of that would be great if you're cutting out fruits or starches, though maybe just coconut water.
I also don't do the enemas as often as I used to because of this, b/c keeping electrolytes in balance so important. I can generally tell by symptoms if something is "off" though right away.