If you have a 12V pump, just hit with weak roof mix, let dwell for 10min and rinse. From looks of pic have someone drive slowly while you or them spray. Buy an extra tote, cheapest you can find, leave at water source filling. Buy a sludge pump, think Russ at Southside sells for about $90. then just transfer water to trailer tank. PW activated sludge pump transfers at about 10 times volume, so will take you about 5min to transfer. Or, I'd just transfer out of pool. that's probably at 40,000 gal. pool from the looks of it, they won't notice few hundred gallons. I did 200 feet just 2 days ago, took me 25min by myself.