In bed fuel transfer tank question

I have a 52 gallon aluminum, it does form condensation(western WA) so I would plan either don’t draw off the bottom and have a drain or have some kind of water separator. I went off the bottom into a water separator and then to a 30gph pump which is plumbed into the trucks filler neck. I have the pump hooked up to a mechanical 30 minute timer, one twist and about 15 gallons transfers.