If you have the room to spare put one under your display tank, closet, jack up the bed and put a large tupperware under there. Whatever works is worth it. Get a complete 20gal high for 60-70 bucks. Shop around for cheaper ones. Tupperware and a buddies spare powerheads is next to nothing. Always ask the store to feed the fish in front of you and if it hasn't been there for awhile ask if you can pre pay and get it in a week. Worst case is getting store credit.