Just started my first fishless cycle. Don't worry about pH? - The Planted Tank Forum
 
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post #1 of 6 (permalink) Old 07-15-2014, 04:27 AM Thread Starter
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Just started my first fishless cycle. Don't worry about pH?

I took a pH measurement before I added anything and it was about 7.4-7.6. I then did a 50% water change to clear up some cloudiness before I started to cycle. Then I dosed my tank with pure ammonia to about 4 ppm, and my pH is now around 8.1.

Obviously I'm adding ammonia,which is basic. So do I just ignore this high pH reading while dosing ammonia during the fishless cycle?
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post #2 of 6 (permalink) Old 07-16-2014, 12:16 AM
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Optimum KH during the fishless cycle is at least 3 German degrees of hardness, and higher is better. This will tend to keep the pH on the alkaline side of neutral, and any reading from about the mid 7s and up is just fine. Do not worry if it fluctuates, but watch that the KH does not get too low. These bacteria use the carbon from carbonates.
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post #3 of 6 (permalink) Old 07-16-2014, 01:07 AM
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Low pH e.g. 6.0 -6.8 or so will slow the cycle, perhaps even stall it.
pH of over 7.0, preferably 7.5, up to 8.0 or so, will speed it up.
You're good.
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post #4 of 6 (permalink) Old 07-16-2014, 04:07 AM Thread Starter
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Hmm, I forgot about KH since it didn't come in my API test kit. Guess I need to pick up a test for that tomorrow.
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post #5 of 6 (permalink) Old 07-16-2014, 01:24 PM
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I would not worry about any reading during cycle, but it's best to use the proper water mixture for whatever your livestocks will be. This way you don't need to adjust after cycling.
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post #6 of 6 (permalink) Old 07-17-2014, 01:11 AM
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While you are trying to grow the bacteria at the fastest rate make the water suit the bacteria best.
After the colony is established, it is OK to change the water to whatever the livestock want. The bacteria may slow down, but that is OK, especially in a planted tank.

It is almost impossible to grow a colony of these bacteria in the extremely soft, acidic water that is required by certain fish and other critters.
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