New Tank, mess with Ph adjustment? (noob) - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 7 Old 10-15-2013, 01:26 PM Thread Starter
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New Tank, mess with Ph adjustment? (noob)

I have a newly setup 45g tank, with fish in it for three days now, with only plastic plants. Just received my test kit, and got Ph=7.8, Ammonia=0.5ppm, Nitrite=0ppm, Nitrate=10ppm. We started with tap water, used Prime, waited 24h, used API QuickStart and added fish (2 guppies, 3 neon tetras).

I think that makes the Ph a bit high, but wonder if it makes more sense to just monitor until the fish have been in the tank for more than a few days. (I suppose I could measure the Ph of tap water to see what our water supply is...)

Advice for a newbie? Thx.
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post #2 of 7 Old 10-15-2013, 04:04 PM
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I think that makes the Ph a bit high, but wonder if it makes more sense to just monitor until the fish have been in the tank for more than a few days. (I suppose I could measure the Ph of tap water to see what our water supply is...)

Advice for a newbie? Thx.
  • Absolutely measure the tap water. The pH will not go any lower than your tap without a lot of chemical addition that are stressful to your fish. Playing with dynamite is less dangerous than playing with the pH in an aquarium, You are asking for a pH crash which will probably destroy your tank.

Nobody's life, liberty and happiness are safe when Congress is in session. Hallyx kindly reminded me that this statement is attributed to Mark Twain. Even more pertinent today then when he said it.
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post #3 of 7 Old 10-15-2013, 04:26 PM Thread Starter
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Absolutely measure the tap water.
The ph of the tap water is around the same - 7.6 or 7.7.

So... don't mess with it? Even though it's not in the 'ideal' range for a community tank?
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post #4 of 7 Old 10-15-2013, 05:02 PM
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A stable pH that's slightly out of range is better than one that fluctuates. There's a lot more that has to be taken into account, hardness, TDS, the only reliable way to change the pH is to start with RO, gives you a blank slate. Changing the pH of tap water is difficult at best, deadly at worst.
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post #5 of 7 Old 10-15-2013, 05:04 PM Thread Starter
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the only reliable way to change the pH is to start with RO, gives you a blank slate.
um... What's "RO"?
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post #6 of 7 Old 10-15-2013, 05:10 PM
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Reverse osmosis, removes all the minerals from the water. Hardness stabilizes pH, hardness is the mineral content. You adjust the pH, then remineralize to stabilize the pH.
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post #7 of 7 Old 10-15-2013, 05:38 PM
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pH rises as carbon dioxide goes down.

So your "high" pH probably means low carbon dioxide. Which the fish should appreciate.

getting a particualr pH value with chemicals can change all that..


my .02

maintain Fw and marine system with a strong emphasis on balanced, stabilized system that as much as possible are self substaning.

have maintained FW systems for up to 9 years with descendants from original fish and marine aquariums for up to 8 years.

With no water changes, untreated tap water, inexpensive lighting by first starting the tank with live plants (FW) or macro algae( marine)

see: http://www.tropicalfishkeeping.com/a...-build-295530/
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