Do you equalise water changes with the main tank's temperature ?

Discussion in 'Water Parameters and Additives' started by Warr7207, 6 Jul 2008.

Voter count: 31
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Do you equalise water changes with the main tank's temperature ?

Poll closed 5 Aug 2008.
  1. Yes, using a heater

    16 vote(s)
    51.6%
  2. No

    15 vote(s)
    48.4%
  1. Warr7207

    Warr7207

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    I would like to know if who actually make sure there WC water is the same temp. as the tank ?
     
    Last edited by a moderator: 7 Jul 2008
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  3. Mekaeel

    Mekaeel Moderator MASA Contributor

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    in my case when i use synthetic.i keep the RO drum in the sun to heat up to 26 then add the water to a drum,chuck in salt until i get a SG 1.026
     
    Last edited: 7 Jul 2008
  4. Tobes

    Tobes Retired Moderator

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    I first heat the RO up to 25deg and then add my salt - dissolves easier when water is warmer. I then leave the heater and powerhead inside the drum until I do a water change. I match the temp and salinity(using a refractometer) as close as possible to make my fishies feel comfortable in their glass home :)
     
  5. Mike

    Mike Retired Moderator

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    Yep, i have to, otherwise you can't get the salt through the ice.:)
     
  6. gaz19

    gaz19

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    oooops:whistling:
     
  7. Rory

    Rory Admin MASA Contributor

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    You should heat the water up any way to aid dissolution. I'd imagine it would also be better to oxygenate it at the temp it will be at in the tank
     
  8. Al

    Al

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    Did my first water change on Saturday, Heated my water from Friday night and added salt after the water was about 20 -22deg.Left it for the night and did the water change on saturday.:thumbup:
    </IMG>
     
  9. Mekaeel

    Mekaeel Moderator MASA Contributor

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    make sure the temperature of the new water is the same as your tank.too cold water will result in a whitespot breakout in fish
     
  10. Warr7207

    Warr7207 Thread Starter

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    The reason I asked this question is if you do the sums, the difference in temperatures has to be huge or the WC huge (%wise) to actually effect the tank.

    I take Rory's point that warmer water may dissolve the salt quicker :thumbup1:


    Temp. Sum:

    50L @ 20°C is mixed with 450L @ 25°C, the 50L is 10% of the total volume (50 +450), so it's temperature effect will also be 10% iE: -0.5°C (10% of 5°C)

    I know there maybe other factors involved with water temperature.

    If I am calculating this right a normal type WC for me 5%, would need to be over 20°C difference, before I would have a significant temp. swing.

    My 2c
     
  11. Quinton

    Quinton Smarty-pants Newbie

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    I don't fuss as much for smaller changes (say 5-10%, although the solubility points above definitely do apply). But for larger changes (e.g. 50%) one needs to be very careful to match the temp, salinity and pH.
     
  12. Rock pool

    Rock pool

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    When I collect from the sea I just leave the drums in the sun for a few hours
     
  13. Rory

    Rory Admin MASA Contributor

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    While it's true a smaller water change wont have much effect on the temp a .5 degree swing in a few seconds is probably pretty big to some sps... If I know the water is a very different temp I will add it bit by bit.
     
  14. Alan

    Alan Admin MASA Contributor

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    Depends on the size water change, for std water change of 150L then no i dont, as its only 5% of system. Larger water changes of 40 - 50% i would.
     
  15. Mekaeel

    Mekaeel Moderator MASA Contributor

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    very true,i would think any water change less than 10 % wouldnt really affect the tank temperature
     
  16. Mekaeel

    Mekaeel Moderator MASA Contributor

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    by the way,make sure that 10% isnt an ice block:p
     
  17. CaCO3

    CaCO3

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    For smaller changes I have 2 drums of same size +-20l. First I make sure the level is correct (top up.) The next day I syphon from the tank into the one drum using air hose, at the same time I syphon new water from the other drum also using air hose. Takes about 30 minutes or so.
    It is gradual and I can chill with the rugby and a :peroni: at the same time.:1:
     
  18. 2balive

    2balive

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    I buy pre mix in a 20 l container. Before a water change I leave a heater (set at my tank temperature) and a air stone in it for 48h.

    Important to check the salinity again as I have notice serious differences between the different shop's mix strength.
     
  19. Matt

    Matt MASA Contributor

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    I voted no but I do heat my water - to approximately same temp as tank - I find the water change as negligible effects on temp if it's not exactly the same temp.
     
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