It just occurred to me that getting parts for my Hydor 600 is a real PITA and I should have a back up if it were to go down. Ideally a Hydor 600 power head- but other than that a single HOB or couple of internal air driven foam- what do you think?
Unless your tank is overstocked your fish should survive just fine for a few days while a new filter gets sent from amazon or similar. If your tank is overstocked an air stone will be fine for oxygen. Personally I can't imagine having a few hundred dollars of filter sitting around not doing anything.