Okiedokie
Starting from the
bottom of the canister, you need to arrange the sponges as follows :
1st basket
2 Fine Blue - and they have a slight gap above them
2nd basket
2 Coarse Blue (or 1 Blue and 1 Green) - See comment regarding green sponge below
1 Black Carbon (see comment about carbon sponge blow)
1 white Filter Floss pad
Green Nitate Sponge
To be honest, get rid of this sponge and replace it with a a coarse blue sponge. The Nitrate sponge only has a very limited life of a few weeks and is costly to replace. If you maintain weekly water changes and do not have an overstocked tank, there is really no need for this sponge
Black Carbon Sponge
This also only has a life of a few weeks. Best to just discard this sponge altogether. But keep one spare so that you can add it to the filter to use after a tank treatment - as it removes all traces of medication.
White Filter Floss
This should be rinsed or entirely replaced on a weekly basis
All blue sponges can be used until they start falling apart (after several years) and there is really no need to replace them every few months. Do however rinse them in some siphoned tank water every now and again. I do mine weekly but other people do theirs every few weeks.
Care of impellor and filter head
This needs a good clean every few weeks. Give it a good rinse under the shower and make sure any gunk is removed.
That should really do the trick and keep your filter running well.
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