Anyone who can please help me, my yellow lab(ray)died yest from what I think was finrot..so I've just dosed my 300l aquarium..it said to take out all carbon and zeolite filter media(is the sponges either of these???) I've taken them out,I have the filters running with no media pls someone help me..also the waters fizzing..is that normal?any help greatly appreciated. Ps hope everyone's well..merry Christmas
