Yet another week flies by and with the temperature of the ranchu pond creeps slightly higher. This week at times it has gone above 18 degrees during when the sun has been out and i have limited the amount that it dropped again at night. This has meant that today the pond broke 18 degrees C.
Today, the ranchu perked up massively, following a water change. They were easily as active as i've seen at any time this season, with some chasing occurring. I will now slow down the controlled temperature rises even further. I may even keep them at 18 degrees now for a while and only let the temperatures increase further when brighter, milder conditions occur naturally.