pH3 is too low.. pH4.5 after all additions is ideal.. The nutrient will help the yeast multiply and work fast, and yeast deal with low pH alot better than the undesirable bacteria for the most part..
Its also best to have that water as aerated as possible in the beginning (dissolved O2 allows multiplication) and warmed up to about 90-100°F.. Temperature will make things go faster until about 110°when yeast start to die, but high temperatures don't make for good drink.. Rum (molasses/sugar mix) ferments fine up to 85%, beers should be done around 68-72°F or lower depending on the type..
Also, in the very end of the ferment when they're getting stressed by alcohol%, its not a bad idea to drop the temperature a few degrees..
And that sludge from the bottom can be used both to get new batches fermenting, and boiled for really good nutrient in the next batch.. Eventually it will get pretty contaminated though, it depends on how sanitary you are..
I'd highly advise soaking everything in bleah water for 30min then rinsing thoroughly before using..
Lastly, rainwater is best for this.. Chlorine slows things down, adds stress, and causes more fusil production.. If your city adds 'chlorine' it can be removed by putting a bucket in sunlight for an afternoon or two.. If they add chloramine, then its alot tougher..