I've read that it's best not to have the male and female in the same tank except when the female is ready to breed. I believe they will still fight even though they are the opposite sex.
Okay, I'm really not new, but I've had this question forever. How do you add water to the tank after a partial water change? I use the hose that hooks directly to the sink and add the dechlorinator a little at a time. I worry that the water can harm the fish before the dechlorinator begins to...