True GDM blow off evaporation issue

[sanitariex]

This may be standard for the True GDM, but I've noticed that I lose a lot more of my sanitizer in my blowoff during fermentation than I feel I should. I'm currently using a quart jug full of sanitizer, at 52 degrees, and two weeks after starting fermentation, all the liquid is gone. Is this normal? Or do I need to use a larger jug or just add more sanitizer weekly? I also leave the fan running constantly, having replaced the thermostat with an stc-1000. Thanks for any help you may have!

 

[AZCoolerBrewer]

Probably the sanitizer got sucked back into your fermentor when the temp came down.

 

[jackyl]

I don't lose a quart in two weeks, but I do have to top off mine occasionally and I keep the fan running all the time. This is a GDM 10 and I do make sure the blow offs aren't directly in line with the fan.

 

[sanitariex]

The thing with being sucked back in, is it was at 52 when I pitched and placed the tube in the blowoff, so I wouldn't imagine the temp dropped while the tube was still submerged. Hmm. I'll try moving it out of line of the fan on the next one

 

[petrolSpice]

As the CO2 bubbles through the sanitizer, it creates bubbles that rise to the top of the jug and spill out. You can lose a lot of liquid this way when its fermenting actively. I use vodka in my airlock now for this reason.

Though I do find it hard to believe that you would like an entire quart.

 

[day_trippr]

Ditch the blow-off once the throes of primary have passed (4-5 days) and switch to an S-lock...

Cheers!

 

[sanitariex]

Ditch the blow-off once the throes of primary have passed (4-5 days) and switch to an S-lock...

Cheers!

Solid advice! About the best solution I can think of.

 

[jcav]

Ditch the blow-off once the throes of primary have passed (4-5 days) and switch to an S-lock...

Cheers!

Excellent advice! That's what I always do as well. After the fermentation settles down in four days or so, I take off the blow off tube and attach an air lock.

John