o today I changed the water, got a heater and switched Nellie to nightcrawlers. Both my local big chain pet stores do not carry sponge filters powered by small air pumps so I have to go to the place where I got Nellie and hopefully they have one. Also, I found out today Nellie is actually a boy so I need to change her... his name.
Andddd Nellie is croaking!!! Like nonstop and I've never ever heard her make noises before so she must be really happy!!! She scarfed her nightcrawler so fast today so I think she's doing a lot better now! Thanks for all your help!!
If anyone want to give name suggestions for a boy ACF, go ahead