Water changes

Discussion in 'General Aquatic Talk' started by Laure, May 24, 2011.

  1. Laure
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    Laure Algae harvester

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    Hi

    I would like to know, for those of you who do water changes from the tap (i.e. not use a drum with prepared water), do you add the tap water and THEN the dechlorinator, or do you add the dechlorinator first and only then start filling up with tap water?
     
  2. Maurice
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    Maurice Aquascaper

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    Hey Laure,

    First some Nutrafin Cycle, then I will add some water of the same temp as the tank.
    I will let that stand for about an hour and then fill the tank

    Regards
     
  3. Laure
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    Laure Algae harvester

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    Hi Morris

    You mention you let it stand. Stand where? I am referring to taking a hose pipe and filling the aquarium directly from the tap, not from a bucket where you "prepared" the water. So I want to know if following the straight from tap method, do you add dechlorinator into your aquarium BEFORE or AFTER you open the tap?
     
  4. Toshi(Walter)
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    Toshi(Walter) Green fingers

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    I add mine first. How big water changes do you do?
     
  5. Laure
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    Laure Algae harvester

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    Let's say its a 25% water change.

    Thing is, I always use a drum with prepared and heated water. We have no chloramine or high concentrations of heavy metals. So I just let the water stand with a heater and surface agitation for 48 hours. Then I do a 50% WC, and this also saves me the cost of dechlor products.

    But for a smaller 25% WC it is convenient for me to stick a hose pipe in the tank, syphon some water out and then refill. So if you add the dechlor before you fill, the theory is that it stays in the water until there is chlorine and then it reacts with the chlorine to neutralize it. How long can it stay in the water in this "inactive" state?

    Another question, do you add dechlor for the entire tank volume or for the 25% water changed?
     
  6. tyronegenade
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    tyronegenade Specialist

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    I never use dechlor and I've done 70% water changes straight from the tap on my Nothobranchius. Because we have water quality issues here at the Uni I change water from a large tank which I add water to and let filter through activated carbon. I also add salt and stuff for the tank. At home the water comes straight out the tap for a 50% water change. Yet to lose a fish to anything that looks like chlorine poisoning. I have lost fish to large pH (causing an ammonia burst) and TDS swings.
     
  7. Schalkv710
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    Schalkv710 Green fingers

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    The last time i bought dechlor was about a year ago... in summer i fill straight from the hose but in winter i heat it up a bit in a bucket first...
     
  8. Erniered
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    Erniered Noob

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    I also stopped adding dechlor. I add straight to the tank and do 50% changes weekly. Been doing this for about 2 years. My smaller tanks are filled with buckets and when i fill the bucket i makes sure the water blasts in to churn it up. No idea if this couple of seconds helps with dechlor but it makes me feel better. My large malawi tank gets filled via hose. I have lost only 7 fish in the last 2 years most being guppies and new malawis.

    Obviously i will change if i ever experience any problems.
     
  9. Jacobus Roux
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    Jacobus Roux Noob

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    I also stopped using dechlorinator a year or two ago; I have two tanks, one 250 l tank, and one 55 l tank. When I add water to the larger one I do it with a pipe directly from the tap. I just let the water run in slowly (so it takes about 3 hours to fill up).

    With my smaller tank I use a 5 l bucket to fill the water. I use my shower head to fill the bucket and "blast" the water into the bucket to help release the chlorine, when doing this you can actually smell the chlorine being released (this would not really help if your municipality uses chloramine, but not sure if any South African municipalities use that. In fact, up to about two years ago most municipalities used to little chlorine in the water. I believe (hope) they fixed it after a nation wide investigation though.)

    Apparently adding the water directly is a dangerous habit though, especially if the municipalities did not rectify the problem. As the chlorine may spike on some days.

    It's working out pretty well for me so far though, as most of my fish are thriving (including my rams and oto's that are breeding).
     

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