I used to use a garden hose hooked up to my backyard spigot but its all cold water and I realized I was stressing out my fish too much.
Now what I do is use my python hose. I unscrewed the green connector and used the female end. Then I bought an adapter from HD for $5 and hooked them up. Then you can add hot water with the bathroom faucet to the new tank water and its a lot less stressful for your fish. Before, my temps would go down from 80 to 70 during wc, but with the python hooked up to the bathroom faucet, I can keep it at 80 or even make the new water 85 when I feel like it. OP I know you don't have a python but its really worth it.