ph problem in new tank - Page 2 - Tropical Fish Keeping - Aquarium fish care and resources
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post #11 of 15 Old 01-29-2008, 04:28 PM Thread Starter
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Alrighty, update on low ph problem (6.0)

All water samples from tap are steady at 7
Tap water with Chlorout steady at 7.2-7.4
Sample tap water with gravel steady at 7

I am now testing everything in tank to find what is keeping ph low in tank.

amonia 0
nitrites 0
nitrates 0

been cycling for 2 weeks

any ideas are welcome
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post #12 of 15 Old 01-30-2008, 12:31 PM Thread Starter
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I added more gravel to my sample. After looking at it closely it seems to be losing its color! It is black gravel and it seems to me it was originaly white. Paint or coloring used must be disolving in the water...

I let the sample sit for a cpl hours and the ph is going down.

I wish I had kept the bag to warn others of this brand and company...
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post #13 of 15 Old 01-30-2008, 02:00 PM
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Wow, good to know about. Did you buy this at your LFS? Maybe next time you're back there you can try to find it again. It's awesome that you were so curious and insisted on investigating! Interesting and surely helpful to others on this forum :)
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post #14 of 15 Old 02-04-2008, 07:56 AM Thread Starter
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So I changed my substrate and the ph still went down gradually. Seems like my tap water loses its ph very gradually. So even though i thought i nailed it, it was hasty. Added crushed coral to keep it up.
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post #15 of 15 Old 02-08-2008, 04:21 PM
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PH Changes

I don't know if this applies to your case or not, but I discovered that if I let my tap water simply aerate in a bowl overnight the ph goes from 7.0 to over 8.0. It's as though it is reacting to the air and becoming alkaline. Probably someone here with a chemistry background can explain this. I know the water is hard. I overdoes it with neutral regulator and let it sit for at least 48 hours before I use it in my tanks. This seems to get it back into the low 7.x range. I can never get it to 7.0 because the minerals are buffering the regulator too much.
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