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  1. #11
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    Re: Dying fish and Yellow vegies

    Thanks for all the advice everyone, I really appreciate it. I am raising comet goldfish, they are inexpensive and fairly resilient. So what I am gathering from all of this is that I'm trying to hard to get everything right too fast. I changed out 60 gallons of water last night, my tank is 300 gallons. Should I add more fish? I only have 6 - 5" goldfish right now. The pH down I used I picked up at the hydroponics store and I was told it was safe for consumption and wouldn't hurt the fish, so I'm pretty confident that it's good stuff. I have 2 ways I check pH, I have an electronic tester that goes to 14 and it has never read higher than 8.0 then I test with my liquid test kit which has a low pH and a high pH test and it is between 7.7 and 8.0. I will be removing the oyster shells this morning, on my way out there in a minute. The new fish are doing very well so far. I will keep you posted. Real quick, the question I need answered right now is should I add more fish?

  2. #12
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    Re: Dying fish and Yellow vegies

    personally, i wouldn't use the ph down no matter what the "hydroponic store" says.. your ph will come down naturally.. trying to change it will stress the fish and make them more apt to get sick
    you won't need to add shell grit until your system drops below 7, the shell grit will buffer your system to about 7.4 if you have enough of it

  3. #13
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    Re: Dying fish and Yellow vegies

    Should I add more fish?

  4. #14
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    Re: Dying fish and Yellow vegies

    what are your ph, ammonia, nitrite and nitrate readings?

  5. #15
    Members samtheman's Avatar
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    Re: Dying fish and Yellow vegies

    You are going to need more fish but if your ammonia or nitrite levels are too high the fishes will probably die. Keep testing the water and check the readings that Keith is suggesting.

  6. #16
    Members cedarswamp's Avatar
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    Re: Dying fish and Yellow vegies

    I'm assuming since you got the ph down at a hydro store that it's General Hydropnics brand?

    http://www.generalhydroponics.com/ge...H_Down_Wet.pdf

    Plants don't care where the ammonia/nitrite/nitrate come from, at this point IMHO you should just cycle your system with plain old household ammonia dosed to 2 to 3 PPM. (No detergents or fragrances), then add fish after your system has cycled.

  7. #17
    Moderator urbanfarmer's Avatar
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    Re: Dying fish and Yellow vegies

    2 H3PO4 + 3 Na2CO3 --> 2 Na3PO4 + 3 CO2 + 3 H2O

    Na3PO4 is the salt accumulating in your system, mostly.

  8. #18
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    Re: Dying fish and Yellow vegies

    My pH level has been a steady 7.8 - 8.0, Nitrate, nitrite and ammonia have been according to the chart that came with the test kit, at the lowest levels. alkalinity has been 40 ppm.

  9. #19
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    Re: Dying fish and Yellow vegies

    always a growth experience!

  10. #20
    Members bcotton's Avatar
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    Re: Dying fish and Yellow vegies

    Dying fish and yellow veggies.. If your PH is ok, and your ammonia and nitrites are ok, i think it's time to look at your system itself... What materials are you using can something be bleeding something harmful? How is aeration? Is it possible you have an anaerobic zone seeping methane into your water?

    Not to contradict everyone, 7.8 ph probably wont kill your plants but 7.8-8 ph is pretty high. Even if you have iron in your water a lot of plants are going to have trouble absorbing the iron. Your fish should be fine though.

    brian

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