So, I think my Marineland Penguin 100 died on me while I was at school today. Water is still going through it but the Biowheel isn't moving and the water level is sufficiently high. Are my fears correct?
If so, how soon do I need to replace it? I have an air stone in the tank so it's aerated. And should I replace it with another Penguin 100, or do you have another suggestion?
I have a 10-gallon aquarium, just so you all know.