jessicarf00
New Member
i have a hob filter which i have never changed the filter media in. iāve been doing research and iām wanting to switch the media to a sponge so i wonāt need to buy new ones and so that my tannins wonāt be filtered out. my question, however, is how? should i put the sponge in the filter, leave it for awhile (2-4 weeks?) then take out the old filter media? any advice would be appreciated!