I have kept t. fish for over 20 years, have three aquariums and in all these years never had any probs. except last night. I have 60 litre tank in the B.Room. Last night I awoke to the sound fish impacting against the glass... thump, thump, thump. I got up took the lid off and peered down. The black mollies were making frantic (and fatal) impacts with the glass sides of the aquarium.
I went back to bed - there was nothing I could do at 2am. In the morning thirty plus mollies were dead. The night before they took their food as greedily as ever. This is the strangest thing to have happened in all my years as a aquarist.
My theory... Over-populated tank! Mollies release some kind of chemical that produces a mass flight - "I gotta get out of here" - sort of reaction. No where to go in an Aquarium - result mass death by impacting the glass. I fished the dead ones out, did a 50% water change now everything back to normal with the few surviving black mollys and the platies. A few swords were affected as well. Weird and just a little macabre too.
Any one know the cause or has had a similar experience, please?
I went back to bed - there was nothing I could do at 2am. In the morning thirty plus mollies were dead. The night before they took their food as greedily as ever. This is the strangest thing to have happened in all my years as a aquarist.
My theory... Over-populated tank! Mollies release some kind of chemical that produces a mass flight - "I gotta get out of here" - sort of reaction. No where to go in an Aquarium - result mass death by impacting the glass. I fished the dead ones out, did a 50% water change now everything back to normal with the few surviving black mollys and the platies. A few swords were affected as well. Weird and just a little macabre too.
Any one know the cause or has had a similar experience, please?