Hello all!!

ok i need someone to explian as simply as possible the differences in filters? i got a (i think its called a cartridge one - where it sticks to the side of the tank with the sponge)

so what is an undergravel filter and how do they work? (i assume they are for big tanks?) and what and how do they bio-filters work?

sorry to ask such a silly question - everywhere i look has such confusing info!!

thanks x
Sean

Hi there!

I have few links that will help you to understand this a bit better :


http://www.kokosgoldfish.com/Filtration.html

http://www.kokosgoldfish.com/cycle.html


Sponge filters and cartridge filters work in the same way. The gravel becomes the place for beneficial bacteria to grow when using undergravel filters. However, just any old filter in a tank will not do. things like the size of the fish, how many, and how many gallons the tank is, must be taken into consideration when striving to provide sufficient filtration to keep a growing goldfish's water clean and clear.


So, how many gallons is your tank?

How many fish and how big are they?

How long have you had the tank set-up and running?



If you provide me the answers from above, I can help you figure out what needs to be done to upgrade your filtration to a rate that is good enough for goldfish.....

Post back soon.

Paul