The Garden Pond
My garden pond at the beginning of April. It's still freezing at night. That's why I've got a thermometer in the pond, so I know when it's time to wake up the fish and start the filtration system. You typically do that when the water reaches +10 °C (50 °F).
This is the beginning of June. It's been insanely hot for a while now. I'm waiting for the water lilies to bloom.