First batch of beet kvass

I just made my first batch of beet kvass. I have drunk it before, so I know I like at least some versions of it.
I read a bunch of recipes and tried to generalize from them, but they disagree on many points.
I toasted some leftover whole grain bread. It wasn't rye but it had some rye in it.
I grated a big beet. Some recipes say not to, but only chunk the beets. Some say grating is fine.
I put them in a gallon jar and filled it with water. My tap water seems to be OK. Lacto pickles and sourdough, kombucha and fruit wine all work fine. Our water has chloramine rather than chlorine.
I pondered adding sugar or salt. Both have their partisans. I figured the bread and beets contain both, so if I use a little of each it ought not to change the ferment much. So I used a little of each. Maybe a couple of teaspoons of salt and a quarter cup of sugar.
I covered the jar with a cloth. It keeps the dust and bugs out and is easy to smell through.
After a few days I noticed it was rising in the jar, so I skimmed some off and drank it. Not noticeably sour or alcoholic yet.
The next morning it had started overflowing.
I see why they advise against grating the beets. They seem to trap the CO2. Next time I'll try it with chunks.
I strained some to get the level down and drank it. Starting to taste fermented. A little thick, almost slimy. Creeped me out a bit. I suspect some lactobacillus from my mesophilic yogurt culture got into it and started making  the long polysaccharides that thicken yogurt. (Lactococcus lactis?) Maybe that helped the grated beets trap the CO2.
I enjoyed it, and so far I have seen no ill effects.
Since it's so thick, I added a little plain water to top up the jar -  but not all the way - and I'll try it again tomorrow.
I consider this a successful first approximation. Do you make kvass? Got any tips for me?

Next day:
Tastes even better. Sweeter and more tart both, and a little more bready. Possibly a little less slimy. Adding water was good.
I think the sugar and salt were excessive or unneccesary. Maybe if the beet were smaller, but it was about two pounds.
Can see (where it has dried out a little on top) that the beets are losing color, so they were used pretty efficiently.
Conniptions to strain the beverage out of a gallon of shredded beet and soggy bread. Might be easier with chunked or sliced beets.
Didn't overflow again, so getting the level down below the neck of hte jar was effective.