I've released the female from the jar now, and they are both swimming in the tank. But it seems that weird things are happening. The two fish would normally flare when they saw eachother but when I put them in the tank, nothing happened. They just swam around minding their own buisness. The male prefers swimming at the bottom of the tank, hiding behind the filter, and the female swims at the top a lot. The female has gone over and nudged the male several times, and I think she wants to mate, but the male just swims away. What could be wrong?