u/Key_Project_341

Been using the same mother for about 2 years now but about 2 months ago I switched to a black & green tea mix. Wasn't having very good carbonation so I let my scoby sit for 2 months to recharge and build up. Now its go this almost chalky looking white film on top. Isn't hairy but I want to make sure its not mold. The 3rd pic is another scoby that branched off the first that I let sit to recharge also. It has white but it dosent have that chalk look to it. Any help is appreciated