This is weird. Every single one of my guppies has died in the past couple of weeks. They were in a 29 gallon tank with four mollies, 5 tetras, and 2 glass cats. All the other fish are still healthy and active. Any idea what's up with my guppies? I do weekly 25% water changes/ gravel vacuum and maintain excellent water conditions.

I'm sorry. That is very weird. Could they have gotten some disease that only affected them initially but is still in the tank? Are they overbred? My stepdad used to have lots of guppies and he told me that they would breed and breed until they would just die from the mixture of genetics.

you should check your water levels.
And ya,athena is right most guppies keep breeding until they die

Remember that guppies only live 2 years too.

Ya thats a great way to put it,it makes me so happy to still have
some babies from my first guppy they remind me of her.