What's Happening With My Second Batch Of Kombucha

It's to 8 days now and there is definitely a different smell coming from my under stairs cupboard. my first batch began with a brand new Scoby without a reasonable amount of nutrient just some Apple Cider Vinegar to give it a boost. Well this batch has had the left overs, about 200ml from the bottom of my container to give it a good start. With the addition of the new arrival, the baby Scoby, both seem very happy and hence the lovely smell. I've taken a sample and tested using my Ph strip(see my testing bellow) and it changed straight away to yellow. So it will be back to bottling and preparing for my next batch.