dsb and nitrates ?

[bbreaux1]

my tank just finished cycling and i had measured nitrates about a week ago and they were at 15ppm and now my test are showing zero i was wondering if my dsb could be working already or could my test kit have gone bad that quick ive covered them right after i used them everytime and put them back in the box no sunlight and i havent done any waterchanges just added water for toping off

 

[thewolfman777]

what kind of test kit are you using? i would not think the kit would have gone bad that quickly especially if you are caring for it in the manner explained. are you doing water changes on a frequent basis? water changes help keep trates under control. also what size is your tank?

 

[mr . salty]

It is possible that the DSB is responsible.Although they usually take awhile to become established.I would take a water sample to your LFS and have them test it.Then you will know if your test is accurate...