I also use starter cultures..... caldwell usually (which is a bit pricey.... but, I repitch kraut juice as well.) I find it more reliable..... kind of like brewing beer and using a known source of yeast and a starter - just assures good results. Might have to give the probiotic supplement a try.
Lacto fermentation does go through 3 phases
The fermentation process has three phases, collectively sometimes referred to as population dynamics. In the first phase, anaerobic bacteria such as Klebsiella and Enterobacter lead the fermentation, and begin producing an acidic environment that favors later bacteria. The second phase starts as the acid levels become too high for many bacteria, and Leuconostoc mesenteroides and other Leuconostoc spp. take dominance. In the third phase, various Lactobacillus species, including L. brevis and L. plantarum, ferment any remaining sugars, further lowering the pH
On a side note if you want to promote a acidic environment quickly, nearly any wine/brew shop sells 80%+ lactic acid. A tiny bit goes a long way.
I use Korean made "kimchi fermenters" for nearly everything now. They greatly limit contact to oxygen which cuts way done on yeast in longer ferments.
E-jen fermenters are available in a huge variety of sizes and they are available on Amazon/Ebay. I use Nice-Lock brand which are similar but pretty uncommon online. Asian/Korean markets have them sometimes.
Livart used to carry all the sizes but now i cant find them.
[ame]https://www.youtube.com/watch?v=yyYza70q9ic[/ame]