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How often to change water

Discussion in 'Betta Splendens' started by Kelly Preussner, Nov 9, 2019.

  1. Kelly Preussner

    Kelly Preussner New Member

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    My daughter has a betta tank with 2 fish separated by a divider. It is a 5 gal with filter & heater. I have enclosed a picture of the tank. My question is how often should we change the water & how much water should be changed? Thanks
     
  2. essjay

    essjay Moderator
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    Water changes should be at least 50% once a week. The only exceptions are if a fish is sick, or the tank is cycling when more water changes should be done.
     
  3. Deanasue

    Deanasue Moderator
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    For my bettas that we’re in a divided tank, I did a 75% water change on tank cleaning day and another 25% mid-week. That as because they were in small quarters and both producing waste.
     
  4. Kelly Preussner

    Kelly Preussner New Member

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    Wow, that is much more than we are doing. The tank is very clean & clear. We have been doing monthly 50% change. I don’t have a small vacuum so have not touched the gravel. Should I be cleaning gravel? Thanks
     

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  5. Linda N

    Linda N Fish Fanatic

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    It helps to use a siphon to clean the gravel, like you are vacuuming it. Lots of crud settles in there - fish waste, uneaten food. If you stir it up would probably surprise you how much can be in there.
     
  6. essjay

    essjay Moderator
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    Just because the water looks clean it doesn't mean it is good. The things we need to remove from the tank - nitrate, fish hormones, things excreted by the fish - are all soluble in water and we can't see them.
     
  7. Deanasue

    Deanasue Moderator
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    Most members on here do a weekly water change. My nitrates were high and is why I did twice a week water changes. What are your ammonia, nitrite, and nitrate readings. That will tell you a lot on how your water quality is.
     
    #7 Deanasue, Nov 10, 2019
    Last edited: Nov 10, 2019
  8. Kelly Preussner

    Kelly Preussner New Member

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    Thanks for the info. Levels are all good. PH 8.0, ammonia 0, nitrite 0 & nitrate 5.0
    I am sure fish waste is on gravel but probably no food. My daughter feeds them 3 pellets everyday & they eat all 3 immediately. They seem quite hungry but don’t want to overfeed. Does that seem about right for food?
    We will switch to weekly water changes. Thanks
     
  9. Deanasue

    Deanasue Moderator
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    I am the wrong person to ask about feeding. I know I overfeed. :-(
     
  10. seangee

    seangee Member

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    Well done your daughter. If more people fed that way we would have a lot less help my fish is sick / my tank is cloudy / my ammonia is too high (etc etc) posts.

    I also do 75% per week.
     
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