If you have multiple aquariums in your home, it’s best to buy separate equipment for each of them. Items like algae scraping magnets, grabber tongs, and fish nets may seem like the perfect tools to be used on several different tanks. They can easily become mobile and can serve the same purpose across many different aquaria. Heck, you could even use these devices in freshwater or saltwater tanks, but we don’t recommend doing any of this. By moving equipment from tank to tank, you run the risk of contaminating each of the setups with algae, parasites, or even diseases from another. So, spend the extra few bucks to properly outfit each of your aquariums with the right gear.