A big rubbermaid will work. I have used rubbermaids as long-term aquariums in the past. I bet your canister will still work fine. If your OTB fits that will be fine too. Realistically, you don't need any filter for that short period of time, just anything for aeration. A bubbler and maybe a heater is all you need. Toss some prime in there Tuesday morning to kill whatever ammonia arises. Don't feed and keep the lid on but not snapped shut and the bubbler will keep enough fresh air and aeration for oxygenation.
Also, keep your gravel and filters moist so the bacteria doesn't die off and do expect a 'mini-cycle' when you get going again.
I have housed 3 10' fish in a 40ish gallon rubbermaid for 10 hrs before without any problems (no filteration, bubbler or heater either. 24 hours is long enough I'd add the bubbler.
When you put them back in the tank try to get the tank temp to match the rubbermaid temp then slowly adjust it to where you want it to be.
Also, keep your gravel and filters moist so the bacteria doesn't die off and do expect a 'mini-cycle' when you get going again.
I have housed 3 10' fish in a 40ish gallon rubbermaid for 10 hrs before without any problems (no filteration, bubbler or heater either. 24 hours is long enough I'd add the bubbler.
When you put them back in the tank try to get the tank temp to match the rubbermaid temp then slowly adjust it to where you want it to be.
