sure why not,, but be aware that does NOT mean it is cycled,, 2-3 days will get the tempurature stabilized and establish that all the equipment is working
---- then a few hardy fishes, danios perhaps,, the fishes will produce AMMONIA, bacteria will begin to bloom to consume the ammonia,producing NITRITE,,, bacteria will spring up to consume the nitrite,producing NITRATE
----then once you are into the nitrate stage,,, a regular schedule for water changes to dilute the nitrates and replenish minerals that are depleated by the ongoing use of the water by the fishes
----you need a testing kit to keep up with what stage of the process you are in,,,personally i like the Aquarium Pharmacuticals Master Test kit, they are available in freshwater & saltwater which include all applicable test mediums for the particular application
----be PATIENT this whole process may take a few weeks,, If you rush it you will end up with dead fishes, a waste of money and a lot of frustration