Did 50% water change PH dropped from 7 to 6 Help

Discussion in 'pH' started by sambofish, Dec 21, 2012.

  1. sambofishValued MemberMember

    Good morning,

    I have a 56 gallon planted tank with angelfish, gourami's, black neon's, madagascar rainbows. last night at around 6:30 I did a 50% WC in my tank as I was adding two new plants to it, before I did the wc my ph was at 7. This morning at 10am. I checked the PH at its at 6. my results as of this morning are High PH 7.4, Ammonia-0, Nitrite-0, Nitrate-0 and temp-80. I use prime for all my wc. Will this be a problem for my angelfish. I'm a little nervous because during the WC a angelfish died.

    Thanks for your help.
  2. luke355027355027Well Known MemberMember

    Did you get thae water straight from your tap. Or did you treat it in a container

  3. sambofishValued MemberMember

    It was tap water that I treated before I used it. I have two 10 gallons buckets that I fill up and treat with prime for 15 minutes before I pour in.

  4. Matt BWell Known MemberMember

    I would check my taps ph right out of the faucet and after sitting out for 24 hours. If there is a significant difference you may need to do much smaller pwcs to avoid swings.

    I am not surprised and angel dies under those conditions, the ph scale is logarithmic, meaning 7.0 is 10x more acidic than 8 while 6 is 100x more acidic than 8. So your water swung around in acidity by 50 or 60x.

  5. sambofishValued MemberMember

    Normally I only do about a 25-35% WC...however, because I was adding plants and its a column tank..I needed to get deeper into the tank. Anything I can do to fix this? Also the fish are at the top of the tank which is not usual for them? How can I raise the PH? is their an O2 issue now?
  6. Matt BWell Known MemberMember

    You can raise the ph by adding crushed coral to the filter to raise kh and gh thus ph. I would recommend testing your water kh and gh before doing anything to alter it.

    The best thing you can do right now is prevent anymore changes in ph for now so they can acclimate to current conditions.

    We need to find out why the wc dropped it so much so I would test my tap and aged tap water. I'm assuming you are not on a well so a possibility is the water company changed something. They could be putting out softer water now, thus the tests.

    Hanging at the surface can indicate an o2 issue, did you shut off your filter or airstone?
  7. sambofishValued MemberMember

    Matt B- I shut it off when I did the WC last night, however, I turn it back on when I'm done and its been on every since. I don't use airstones because I've read its bad for a planted tank. NYC waters pretty much stays at 7.2 unless something has changed recently that I wasn't aware of because of sandy. I will taste the water when I get home to see if it has indeed changed.
  8. Matt BWell Known MemberMember

    Well, it shouldn't be an o2 issue unless you are using co2 or the temperature came way up. They may just be stressed from the ph rollercoaster. Airstones can be counter-productive if used in a tank with the co2 levels artificially inflated. The bubbles release the extra co2 returning the levels to normal.

    Not to be funny, but you did mean "test" not "taste" the water when you get home right?
  9. sambofishValued MemberMember

    HAHA Yes I do mean Test...HAHA. I haven't installed Co2 yet...I just dose with co2 right now. That will be my 2nd big purchase after I get my lights.
  10. Matt BWell Known MemberMember

    Even if I could tell the parameters by taste I don't think I'd use that ability on my aquariums! :;laughing
  11. catsma_97504Fishlore LegendMember

    Sounds like your tank has been depleted of carbonate. This can happen when the tap changes (something I deal with) or it can happen when the plants consume it.

    As your fish are in distress I would add 1/8 tsp baking soda. Wait an hour then retest your pH. If fish are still distressed and pH is still low, repeat.

    You will also need to purchase a GH/KH test kit. Then you will be better prepared for these types of issues.

    Hopefully you won't lose your fish.
  12. sambofishValued MemberMember

    HAHA...I don't think my wife would let me if I could...HAHA
  13. skjl47Valued MemberMember

    Hello; Perhaps smaller volume water changes more often. This way there should not be such dramatic swings with a water change.
  14. Matt BWell Known MemberMember

    I may have misunderstood what sambofish was saying, I thought the ph was now at 7.4 and adding baking soda to that would not be ideal correct?

    Sambofish-Is your ph now 7.4 or 6?
  15. sambofishValued MemberMember

    It's at 6 Matt_B, wife tested the tap. PH is at 6.6. Sandy has changed the PH in NYC. So do I add crush coral or peat to my canister to increase PH and how soon would it take to take affect.
    Last edited: Dec 21, 2012
  16. Mrs.PriceValued MemberMember

    You can add crushed coral or seashells :) seashells are prettier to look at
  17. Matt BWell Known MemberMember

    You're going to have to be careful here because I can't imagine a utility would leave it that low for long because it is acidic at that point, it would be a shame to do a bunch of messing with the tank ph to have your tap swing back up.

    For now I would follow Catsma's advice above. You can kill your fish with baking soda if you do it too quickly so follow her advice to the letter. Then, for the near future, it may be best to leave your tank with a stable ph (no pwcs) for the next couple of days and see how your tap tests after that.
  18. sambofishValued MemberMember

    I've put in my 2nd dose of baking soda, is their a limit on how much? Because PH is still 6. Does baking soda stabilize the PH? Should I temporarily add an air stone (came home another angelfish died....sigh) because of these fluctuations should I not add coral or peat to the tank.
  19. Matt BWell Known MemberMember

    The baking soda should increase your kh, stabilising the ph. Normally as the kh comes up the ph will as well. What is your kh and gh?

    Imo an airstone will not hurt, you can go ahead and add it.

    Peat would lower it, essentially what you are doing with the baking soda is a fast version of using coral so you don't need the coral right this second.

    Make sure you are allowing time (an hour as Catsma said) between soda doses and checking ph.
  20. sambofishValued MemberMember

    PH is still 6 smh. Added my 3rd dose of baking soda.

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