What do you do to your water for water changes?

Discussion in 'Beginner Discussions' started by PJL, 16 May 2013.

  1. PJL

    PJL

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    Hey all Im using RO water for my water changes and was wondering if you do anything to your water ( accept adding salt ) before it goes into your tank. Reason Im asking is Im still cycling my tank, 2 weeks in, and I have noticed my KH is a bit low. Im not going to change anyhing before my cycle is done but Im just curious if this is something you would look to change before the fresh water goes in? Thank you in advance!
     
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  3. Fred d

    Fred d

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    Your water needs to cure mature so dont take any out before your cycle is complete . Top up with ro only until then
     
  4. Dorry

    Dorry dorry

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    Hi, why do you want to do a water change while your tank is still cycling in your 2 week. some guys i know ad a dead fishie in the tank so the backteria can starting to grow. Even if you do a water change your KH wil be a bit low. your last sentense what fresh water are you talking about. your tank is fill with ro water mix with salt and in your tank cycling for 6 weeks. in that period algae will starting to crow and...... you ad your CUC.
     
  5. HOT SAUCE

    HOT SAUCE

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    what are your KH levels exactly.. i dont add anything to the RO water before or after i mix it with the salt
     
  6. PJL

    PJL Thread Starter

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    Hey Im not planning on doing a water change untill my cycle is complete The fresh water Im talking about is the newly mixed salt water going in when doing your water change. I was just curious what everybody else was doing to their "fresh" water besides adding salt. I measured my water tonight and the KH was 4,5 dKH
     
  7. Visser

    Visser MASA Contributor

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    Are you sure the test kit is in DKH & not meg/l?
    DKH of 4.5 is very low, but meg/l is almost on par (almost too high...)
     
  8. PJL

    PJL Thread Starter

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    Hey Def DKH Just double checked the test kit Ill do another test tomorrow just to double check
     
    Last edited: 16 May 2013
  9. Nemos Janitor

    Nemos Janitor

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    What make of test kit?

    And what make of salt mix?
     
    Last edited: 16 May 2013
  10. PJL

    PJL Thread Starter

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    Hey just did another test. Tested 5,1DKH but the kit is very sensitive, bottom line is its still to low Test kit is Salifert and salt is Seachem When I mixed my water when I filled my tank initially I mixed 34g per liter as per instructions. The first time I tested I got Sg: 1,021 ( refractometer ) Each time I did top ups I mixed in salt with my RO water in stead of just using pure RO water I did this to get my Sg up. As it stands I additionaly added 350 g and my Sg is perfect at 1.026 so now when I do top ups i use pure RO water This is the only thing I added to the tank to date, dont know if this could have any affect
     
  11. Nemos Janitor

    Nemos Janitor

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    Your calcium level is????
     
  12. Dorry

    Dorry dorry

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    Hey I just mention it just for incase.:thumbup:when i do a water change the next day i do all the test calsium, magnesium Ph,Kh..... then wat is short i just add. At this stage all i ad is calsium and magnesium and keep my PH,Kh stabel. and iodene, .... and i use fuel. and feed my LPS.:)
     
    Last edited by a moderator: 16 May 2013
  13. PJL

    PJL Thread Starter

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    Unfortunately dont have a Calcium test yet , still waiting on that and my phosphate test kits Rest of my params:

    Ph: 8
    Nh4 : 0,25 mgl
    N02 : 0
    N03 : 0,25 ppm
    Sg : 1,026
    Kh: 4,5 dkh
    Alk: 1,59 megl
     
  14. PJL

    PJL Thread Starter

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    Thanks Dorry I will def go the same route
     
  15. RiaanP

    RiaanP Moderator

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    Yes and no
    Some reefers do not believe in doing water changes during the cycle period, come down to basically being a waste of money as nothing really is in the tank to use up the trace elements.

    Others do believe in water changes, basically diluting the high ammonia levels, helping to maintain lower levels of ammonia during the cycle. Reducing the ammonia levels by dilution would / could shorten the cycle period.

    At the end of the day, it is your own personal choice. But what is the real gain in ending your cycle a week earlier when during water changes compared to the cost of the wasted salt?

    There would be certain critters and bacteria especially the later half of the cycle that could depend on some trace minerals that by then might be running low. So yeah, maybe a combo, instead of weekly 10% water changes, doing the first change on week 3 to 4. Then the next 2 weeks later.
     
    Last edited: 16 May 2013
  16. PJL

    PJL Thread Starter

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    Thanks all for the help! Does the salt that is added to the RO water lift the KH? If the KH is still low at end of my cycle can I simply use baking soda to raise or what would you guys do?
     
  17. Nemos Janitor

    Nemos Janitor

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    If your ca is very high your KH will drop.

    Check the Sg or salinity the salt brand recommends to be mixed. It is possible that you are mixing the salinity to high. This will increase the ca level causing the KH to fall out. Do not add additives to try and correct as the more KH you try to add the more ca will precipitate.
     
  18. PJL

    PJL Thread Starter

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    Morning all I think what I'm going to do is take a sample of my RO water and test that to see what params I'm looking at Them I'm going to mix a saltwater batch exactly according to the directions and check it's params 24hrs later. Im going to compare that to my tanks params and then Ill be able to see how the water changed after it went in the tank and I altered the Sg
     
  19. MistaOrange

    MistaOrange

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    Don't do water changes just keep topping up with RO...
     
  20. the fish

    the fish

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    well when i do a water change i add some stabilty and seachem prime to the water. otherwize i will just do a topup on RO
     
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