Hi there, i'm new here
I have 2 oranda lionhead and 2 ranchu of about 7 cm. I'm working on a 450 litres for them but i have a few questions to ask you.
1) which are the ideal parameters for them? Ph kh gh?
2) do they need a heater? Do you think 20 c is ok for them or is too hot?
I'm a bit...