Ended up buying only four pumps last Friday. We already had a new Hammerhead pump still in its box. Bought it over five years ago for a backup pump, but never had occasion to use it. Went with two Barracuda Golds as they had more gph than the regular Barracudas. The single Hammerhead pump on our 300 gallon tank puts out a tremendous current that our fish love. Here's a clip taken about four years ago during a water change. You can see how the water churns.
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At the end of the water change, our fish head straight for the "headwaters" to play. The current is so swift, Tommy the lutino oscar goes body surfing. The Hammerhead pump periodically spits out air, keeping the tank well aerated.
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