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I’ve been working to understand my various volume measurements throughout brew day and wonder how Trub and other material is handled. For instance, from my batch sparging I have an idea how much grain absorption and MLT losses to expect, but I know when I do a pre-boil volume measurement there is a fair amount of material in there that is going to add to the measurement.

Also, when doing a, lets say, 5g recipe I assume the is the amount of wort into the fermenter. Is this correct? I know that the amount of trub carried into the fermenter various by beer and beer maker so how does one account for the variations?

Trub impacts to volume measurements and calculations

homebrewtalk.com forum

I’ve used gelatin in a secondary and have been able to bottle condition just fine. I’m working on making a Kolsch and want to see how clear I can get this to be. Any experiences or thoughts on cold crashing and using gelatin in the primary and repeating it again the same steps later in the secondary?

Double gelatin – primary and secondary

homebrewtalk.com forum

I’ve read that the coleman 70Qt extreme cooler was a great cooler to convert to a MLT, but wanted a little bit larger one. So I got the 100qt version online thinking it would work out the same. On receiving it I’m second guessing my plan. Take a look at these pictures. 

I’m concerned the ridges inside will create a channeling effect when batch sparging. I don’t think the 70Qt version has these. 

The other thing that seems different from the 70Qt version is the drain channel. Pictures from the 70qt version look like there is a distinctive channel (and the sticker on 100qt version looks like it does too). However, the channel appears non-existent and the bottom looks flat (though I haven’t tested to wit the is a slope or not) 

What are your thoughts about the 100qt version? Should I keep it or look for a different cooler?

Thoughts on coleman xtreme 100qt cooler as a MLT