Water changes when the flat gets cold
Tap water in winter comes out noticeably colder than in summer. Pouring it straight in dropped the tank from 24°C to 21°C last year and the corydoras sulked for two days.
Now I fill two 10-litre buckets in the evening, add conditioner and leave them next to the radiator. By morning they are within a degree of the tank and the change takes ten minutes.
| Parameter | Before change | After |
|---|---|---|
| Nitrate | ~20 ppm | ~10 ppm |
| pH | 7.0 | 7.1 |
| Temperature | 24°C | 23.5°C |
Small thing, but the fish clearly prefer it.