Setup a temporary tank. Go to home depot and get a tote bin.
https://www.homedepot.com/p/Husky-45-Gal-Latch-and-Stack-Tote-with-Wheels-in-Black-with-Red-Lid-206201/312871610
Get a Marineland HOB filter on Amazon or similar. Hook up your ATO to the temporary tank with a heater because the...