nitrates are still at 5 after a week

  1. clark12 Member Member

    not a bad thing, i know. but i do weekly 50% water changes and it seems like since i put in purigen my nitrates don't go very high. again not a bad thing, but I'm doing a water change tomorrow and I'm wondering should i knock it back a bit on gallons changed? 75 gal tank, 24 tiger barbs
  2. Dovah Well Known Member Member

    Anything less than 50% per PWC doesn't make sense to me personally, regardless of your parameters.

  3. Aquaphobia Fishlore Legend Member

    Agreed. Water changes aren't just about bringing nitrates down. They're also important for replenishing minerals in the tank.
  4. clark12 Member Member

    i will stick with 50%. thanks. i have some diatoms starting to group up or colonize or whatever they do. any suggestions on that? i will scrub my rocks and heater tomorrow

  5. Aquaphobia Fishlore Legend Member

    How long has the tank been set up?
  6. Dovah Well Known Member Member

  7. clark12 Member Member

    set up just over 2 months ago

    yes i do have gravel. about 2"

  8. Aquaphobia Fishlore Legend Member

  9. clark12 Member Member

    0-0-5 and ph 7.8. after i cycled i never had a problem with any parameters. always a constant 0-0-5
  10. Aquaphobia Fishlore Legend Member

    Awesome! I would still do the regular water changes if only to keep your water properly mineralized:)