For all practical purposes, a gallon of fresh water weighs 8.33 lbs.
A gallon of fatheads will weigh somewhere in the upper 7 lb range. Fatheads sold by the gallon are usually displaced, meaning, how many minnows does it take to displace 1 gallon of water.
They are sold both by the pound and gallon around here. Highest price I have seen around here was 44.00/gallon. Some sell them by the pound, usually between 5.00-7.00/lb retail.
Prices have gone up about 40-50% in the past few years.
100.00/gallon seems a bit steep, that would be about 14.00/lb give or take.
Around here they usually sell fhm in the 250/lb range, being market size.
This was copied from a previous post by EWEST