No water changes

[chevyjaxon]

well I did go out and buy a couple of jars nitrate of sponges today i put them in nylon bags and into the sump BTW i was only kidding about the water change thing, i did do one earlier this week 20% or so. but my nitrates still stayed at
20 ppm I also know that zero nitrates is an impossible level to obtain any living tank will have some nitrates a person knows they are doing exceptionally well when nitrate levels are around 5 ppm in a few weeks with the aid of this sponge material, i should expect to see my nitrates drop considerably any suggestions on how to drop them sooner would be greatly appreciated. i do know my biological filters are working because i haven't seen any detectable ammonia yet
all i can see is the nitrates that they are producing and yes i really am a newbie