You’ll find this phrase used on marine forums when users talk about pumps, especially the likes of Tunze and VorTech pumps. It’s not the be all and end all of pump selection, but every little helps. This is a huge improvement on the old powerheads and can only be a good thing.
Modern circulation pumps are getting incredibly efficient, some turning over 800 lph per watt of energy consumed, and I have no doubt that they may soon even perform at 1,000 lph per watt. By choosing a pump with the highest output of water against energy consumed you get the most efficient model and so the cheapest to run in relation to its output. The cost of electricity always seems to be going up, so we want a pump that’s low in wattage and cheap to run. This is a measurement of efficiency and one of the things I look at when reviewing or comparing a type of circulation pump. A reef tank will need its total volume turned more than 20 times per hour, so if you have a 180 l/40 gal reef tank you’ll need a pump(s) with an output of 3,600lph.Īll pumps will have their output stated on their packaging, in either litres per hour (LPH) or US gallons per hour - and one US gallon equals 0.8 of a UK gallon. This is related to how much water is pumped during each hour. Here’s a rundown of important features to consider when buying a circulation pump for your aquarium: You won’t find a still part in any ocean and marine life is adapted to live in an environment that’s constantly moving. Water brings the corals their food - phytoplankton and zooplankton to catch with their polyps - but it also brings them oxygen, new zooxanthellae algae and washes away their waste. Jeremy Gay looks at types of flow pumps available for the marine aquarium.Ĭreating water movement is one of the simplest tasks you can do, yet it’s also one of the most vital for the very livelihood of corals. Many corals can survive without light, but none can survive without water movement.
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