For yeast...I've been making 1200 ml yeast starters, using Wyeast liquid yeast. Fermentation starts quickly, and is very visible for about 5 days...then simmers down. I'm fermenting for 4 weeks and then going to bottles. Fermentation temp has been a bit low about 62 degrees. That could, at least...
-1 gallon evaporation loss to the boil.
-I'm ending up with 5.5 gallons going into the fermenter. After my first runnings of about 2.25 gallons, I sparge with about 4.25 gallons, making the volume that I'm boiling 6.5. I lose 1 gallon to evaporation, and get 5.5 gallons into the fermenter...
I'm a new all-grain brewer and I've brewed 3 batches so far. I use a 10-gallon Megapot with a false bottom for my MLT and another for my boil kettle. Beers taste great...but I'm getting consistently low OG, ABV and depth of flavor. I'm still learning my equipment, but these have been what I can...