There have been several times I have put over 36 gallons in my 35 gallon tank, but it takes FOREVER!
Mine doesn't. I've been caught out in some really off the wall places and at odd hours of the night and put 38 gallons in my tank ... ... ... ... . wirthout spoon feeding it.
I pump full on until I hear it gurgle, back it down to the last click until stops and top it off until it stops.
Thinking about it, if you guys are stopping at places with the big nozzel, only put it on the first click ... ... ... ..... no need in creating foam.