pump size

Hydro noob here, building a 4 site RDWC: 4x 5 gallon buckets, with a 5 gallon res, so probably 15-20 gallons when full (going into a 4x4 tent/res outside tent). I live in a hot climate so I’m thinking instead of hot noisy air pumps, I’ll go waterfall, with an inline pump pulling water from the...