During the summer months when the water is warmer a constant water flow is almost a must especially for sardines. I do believe there is less oxygen in warmer water, thus constant water flow allows adequate oxygen. Timers are great for cooler/colder water as the oxygen remains in the standing water longer. Live bait needs to swim around in order to circulate water thru their gills, thus I would suggest a real bait tank in order to maximize your fishing experience.
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