These are pictures of all the normal things that can happen when brewing with a scoby...some look a little funny but really its all normal...
I have included these pictures as people often panic when there scobies stop looking all white and pristine after you first brew with them! Scobies can do some weird and wonderful things during brewing.... here is just a few examples....
This scoby has split in two (this often happens as scobies grow in layers and it is not unusual for the layers to sometimes seperate) and has chains of yeasts hanging from it, again it looks a little weird but nothing at all to worry about. All normal here.
Again this scoby has split into several layers (not a problem) and has developed brown fuzz (my term). This brown fuzz (sometimes it is so dark it can look black!) is absolutely normal and you may notice that it also develops in your drink once it is bottled. It is yeast chains joining up in the brew and is perfectly normal. Most people prefer to filter it out of their final drink (coffee filters can be used but are a little slow or a filtering funnel is perfect!)
This is a picture of what the brown fuzz looks like when out of the drink. It can look a little slimy, again nothing to worry about.
This picture illustrates the way a scoby can grow by building up layers. You will see the layers underneath are the original mother and the layers above are the new baby scoby layers. Do not worry if your scoby sinks to the bottom of the jar and a new baby grows on the surface of the brew. This is also normal and there is no perfect or prefered way for a new scoby to grow.
This picture shows new layers of healthy baby scoby attached to very old layers of a mother scoby. The mother scoby is VERY dark brown, this happens over time and is normal, and the baby is creamy white. If tugged gently the old mother will fall free of the baby scoby. Once a scoby has turned this very dark brown it is old and can no longer brew (this can take 6 months to 1 year). It is good housekeeping to remove old bits of scoby like the very dark brown bits from your scoby every now and again, if they do not simply fall off with a gentle tug, they can be cut off using a plastic Knife.