Saison pellicle

[millsbrew]

This saison was fermented with WLP565 Belgian I, and transferred to secondary after 2 weeks. On week 3 I pitched WLP655 (Brett B) that I had grown from starter to use in multiple batches. Around week 8 I took a look and there was a slight white film on top. It looked very typical of Brett pellicles. I left it in the closet for another 4 weeks (3 month total) and was going to bottle tomorrow so I figured I'd take a look. Attached is what I'm seeing now. This is definitely a lacto pellicle right?

My guess is from washing my belgian saison yeast that I picked up a bacteria. Agree?

 

[tagz]

I don't see why that wouldn't just be the Brett pellicle from the 655 you pitched. I've seen Brett pellicles of all different varieties.

 

[Aristotelian]

Looks like the pictures I have seen of Brett. Looks to be relatively thin but the same kind of bubbly film.

 

[secondbase]

It is virtually impossible to determine what is causing the pellicle unless you put it under a microscope. I would guess the brett is what's causing the pellicle but if you're worried, take a pH sample and taste it to see if the pH is dropping or if it's beginning to taste tart/sour.

 

[BGBC]

Most likely the brett you pitched. Temp variations, off gassing, etc can cause the bubbles in the pellicle, even if no additional fermentation is taking place.

 

[millsbrew]

Thanks for the replies. I will check pH. There was a large temp increase recently with the heat wave here. I guess that could be it. All Brett only pellicles I've seen did not have those large bubbles. If pH isn't much lower I will bottle up. Thanks again.

 

[Grannyknot]

its the brett. dont worry.