Why are my tetras in my 55 gallon always spawnig.. from what I understand tetras are difficult to breed, yet my fish seem to be laying eggs constantly, but I don't understand why? And I have witnessed this on every occasion. it first started out with my lemon tetras, who also spawned in quarantine and I did have like 3 fry for a few weeks before they dissapeared.. Then once I moved them to the 55 gallon , they spawned again.. Then I added my black skirt tetras out of my other tank into this one and they also spawned, I never saw them spawn in the 29 gallon ever... I just added 5 silver tips to this tank that were in quarantine yesterday and they have been spawning all day today.. And yes I am witnessing the whole thing, eggs falling onto plants and everything the male is super spastic.. Is there something in my water? I am just so amazed that these fish are spawning like this with no effort on my part, it would cool if the eggs didn't get eaten immediatly.. But still neat..