Yes you can do this and I often do for lagers. One thing… you may not want to make a 3 gal batch in a 3 gal fermenter. You can still use a 5 gal carboy as the CO2 will push out headspace O2.
Or just do a 2 gallon starter in the 3 gallon carboy. You got me thinking that I should be doing this also as I have two 3 gallon carboys sitting around not getting used.
Do a low gravity batch first (Patersbier) and then pitch a Tripel onto the slurry. If the first beer uses slightly different hops (and some do get into the slurry) does this influence the taste of the second batch a lot?
Do a low gravity batch first (Patersbier) and then pitch a Tripel onto the slurry. If the first beer uses slightly different hops (and some do get into the slurry) does this influence the taste of the second batch a lot?[/quote]
If it’s a low hopped beer, it shouldn’t. If I’m going reuse yeast, I’ll boil the hops in a bag to lessen the trub a bit.