Pregnant tetra? Weird ball on base of tank.
Hi, we have a fairly new tank (3 months) with six tetras, three guppies and two Mollie as well as a couple of water snails.
One of the tetras has been acting slightly oddly in the past few days, hiding a lot and not swimming with the shoal. She looks suddenly quite fat and I wonder if she is pregnant...
There is also a large ish (about the size of a large marble) clear ball which has appeared in the bottom of the tank and I wonder if it is a nest? To describe it, it looks a bit like an aquarium ball, but we haven't used one of those since we first set the tank up and this suddenly appeared from nowhere