Have you got air pump with air stone or a wavemaker or perhaps a spare filter, anything like that?
If so, you can use that to keep oxygen exchange by agitating water surface and putting the filter media in a net or something and put that inside the tank.
Will be fine as just a temporary measure until you get a replacement edge filter or even any small HOB might fit.
If so, you can use that to keep oxygen exchange by agitating water surface and putting the filter media in a net or something and put that inside the tank.
Will be fine as just a temporary measure until you get a replacement edge filter or even any small HOB might fit.