old water

Is it safe to use the same water as your old fish for new ones? As long as you clean everything inside, hides, fake plants, gravel, etc?

Hi guys, I’ve just set up a 180 litre tank, and I used about 25 litres of well established tank water. The tank took a while to heat up to 24 degrees Celsius (overnight). I’ve added safe start bacteria, as well as tap safe and added some fish food for ammonia. I also placed 3 moss balls from...