Hold on-
The 3 julies are in a 29 with 2 queen loaches and 2 tiger barbs.
The pair of calvus are in another 29 totally alone. They have plenty of rockwork, so should I maybe take some out?
So there are no other fish to harrass them, and the water was checked the day before I got them and it was all fine. 0 ammonia and nitrite, 8.4 pH, etc. What's going on?