You need to know how many watts it consumes which is listed on the specs for your pump. If it says amps, then multiply by 12 to determine watts. Typically these pumps are about 250 watts so 300 or 400 would be a good bet.
To better answer your question it's not the inverter info you need . Most air pumps are either battery operated or 12v cigarette plug in type,but if it is a "plug-in" type you have then you need to see how many amps it runs on and have a inverter that can accommodate the Amps needed . You can find the amps and volts ECT. On the ID label of the in your case the "air-pump"
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