Help with PH - The Planted Tank Forum
 
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post #1 of 13 (permalink) Old 01-27-2014, 08:35 PM Thread Starter
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Help with PH

I have a 125g planted tank w/two overflows sumps on each overflow I do 50% w/c weekly my ph is about 6.5 and drops down to 4.5 at the end of the week I have Eco-complet /w clay balls in it and some Osmocote Plus what is makeing my ph drop so quickly my tap is hard water 8.0
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post #2 of 13 (permalink) Old 01-27-2014, 08:59 PM
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are you injecting CO2?
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post #3 of 13 (permalink) Old 01-27-2014, 09:35 PM Thread Starter
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No CO2 AT ALL
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post #4 of 13 (permalink) Old 01-27-2014, 10:21 PM
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I'm assuming you have a pH meter? Is it calibrated?


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post #5 of 13 (permalink) Old 01-27-2014, 10:27 PM Thread Starter
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Im useing Sera Test kit it's new
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post #6 of 13 (permalink) Old 01-28-2014, 02:39 AM
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List all of the substances you add to the water, fertilizers, water conditioners, etc. The only way I can see for your pH to drop that way is from something you add to the water. It is very possible that the pH isn't dropping at all, and your pH measurement is wrong. If you have no problem with plants or fish you can probably just ignore the pH entirely.

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post #7 of 13 (permalink) Old 01-28-2014, 03:12 AM Thread Starter
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all I add is 1/4tsp of safe when I do w/c and some Flourish Excel 2x a week Thats all.
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post #8 of 13 (permalink) Old 01-28-2014, 05:18 AM
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If it was my tank I would just forget about the pH. Rarely is a pH measurement important enough for you to need to do something about it.

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post #9 of 13 (permalink) Old 01-29-2014, 03:27 AM
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Hard water doesn't mean it's high in bicarbonates. Test the KH and get back to us. If the kH is low (less than 3) it can and will cause large ph fluctuations over the course of a week as the bicarbs are being used by bacteria.

If your kH is going down over the course of a week, I'd add baking soda to raise it up. Or use crushed coral in a filter bag.
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post #10 of 13 (permalink) Old 01-29-2014, 03:29 AM
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does your tank have driftwood?
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post #11 of 13 (permalink) Old 01-29-2014, 03:29 AM
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Quote:
Originally Posted by Hoppy View Post
If it was my tank I would just forget about the pH. Rarely is a pH measurement important enough for you to need to do something about it.
A pH of 4.5 is simply too low. It can interfere very badly with biological filtration, and some fish may even have a hard time with it.
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post #12 of 13 (permalink) Old 01-30-2014, 01:13 AM Thread Starter
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I have one small pace of driftwood I tested the KH W/The Sera test kit. It till's you to do one drop at a time the color changes from blue to green to yellow I only used one drop it came out light yellow Im not srue what this means?
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post #13 of 13 (permalink) Old 01-30-2014, 01:50 AM
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Quote:
Originally Posted by Kareen View Post
I have one small pace of driftwood I tested the KH W/The Sera test kit. It till's you to do one drop at a time the color changes from blue to green to yellow I only used one drop it came out light yellow Im not srue what this means?
It means your KH is around 1 degree, which is low. This will cause a lower pH, if there is any CO2 in the water, but it should not be that low from CO2 - the amount of CO2 in the water from the air is around 3 ppm, which would not drop the pH that much.

It is still very unlikely that you have a pH of 4.5, so the test kit has to be suspect.

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