Fermenting Super Fast with no new scoby

[miamipoker]

I am on my 4th brew and can't figure this out.
I put my filtered water and make 1 gallon of black tea with 1 cup sugar and my scoby.
During my first 2 batches I tasted the brew after 4 days and it was already sour and not sweet at all. everyone says the initial fermentation takes 7-10 days. My temp is of tea is constant 72-74 degrees. So, it's not that... Also, I'm not forming a solid new scoby on top probably because it's fermenting so fast there is just a layer of slim starting to form. So, I started the 2nd fermination with juice and after 2-3 days tea comes out great.. Lots of Fizz and great flavour.

So, I made 2 gallon batches last night.. about 16 hours ago and my PH tester just arrived.. So, I tasted the batch from last night and it tasted about perfect balance between sour and sweet.. So, I tested the PH and it was 2.9.. Could my tea be fermenting in Just 16 hours? seems crazy no?

 

[Rivenin]

odd question... i've had vinegar form VERY fast, but my kombucha takes a good chunk of time... did you use any vinegar to clean the equipment or drop the PH? just randomly popped into my head

 

[miamipoker]

I do use white vinegar to clean with but always rinse with clean water after before adding TEA.

 

[Wizard Works]

The slimey growth on top most likely is a scoby forming. As long as no green/blue spots form you are doing just fine. PH as you go.

Wizard works