Hi all, my aquarium’s filter suddenly stopped working, (one circled in blue) but however alongside that i have a sponge filter that is working unlike the other filter. So what to do here? My filter suddenly stopped running and it contains bio foam in it and some seachem matrix, the benefical bacteria in my filter wont get killed right? For reference. Its a 20 gallon tank with 1 female molly and 1 female platy in it.