i have just had a juwel aquarium for my birthday and its called a korall-60. Inside it's got a bioflow mini filter, my question is it's only got 1 blue sponge inside, how do i clean it and keep all of the bacteria i've collected? and how often should i clean it?
As this is my first tank i havent got alot of experience but look forward to buying my first lot of neon tetras this saturday fishys yay

As this is my first tank i havent got alot of experience but look forward to buying my first lot of neon tetras this saturday fishys yay







