Tropical Fish Keeping - Aquarium fish care and resources

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-   -   general cycling ?(PH READING) (http://www.tropicalfishkeeping.com/beginner-freshwater-aquarium/general-cycling-ph-reading-108598/)

twinkey 07-25-2012 09:04 PM

general cycling ?(PH READING)
 
well my fishless cycle been going on for 10 days.this morning my ammonia was at 2.0ppm..no nitrites yet...dosed back to 4.0ppm..i did all my tests afterwords..ph went higher

ammona..4.0ppm
nitrites....0.0ppm
nitrates...0.0ppm
ph..........7.6ppm(before adding ammonia)
ph..........7.6ppm(after adding)
High ph....7.4ppm(before adding ammonia)
High ph....8.2ppm(after adding)WHAT HAPPENED HERE :-?

Byron 07-25-2012 09:17 PM

Not sure, but I would stay with one test (the normal is fine if the tap water pH is in the 7's). Different tests (normal vs high) will give you different readings, so keeping things on an even playing field is better.

What sort of ammonia are you adding? If it is not pure, it may have other substances in it. I won't speculate on the pH with ammonia, as I have never done this type of cycling (I use live plants) and I don't know if this is common or not. Those who have used it will be able to say I'm sure.

Byron.

twinkey 07-25-2012 09:30 PM

using ace ammonia janitorial strength formula..
10% ammonia hydroxide
of course i shook the bottle..didnt foam..which i knew it wouldnt

Aqua Jon 07-25-2012 11:10 PM

my rough biochemical understanding would predict a slight rise in pH. Any experts please correct me, but adding ammonia (NH3) is a akaline (basic, not acidic) compound meaning it will grab a free floating hydrogen (H). So as you add ammonia it will become ammonium (NH4). A pH test will measure the number of free floating hydrogen in the tank. A low pH means more free floating hydrogen and high pH means less free floating hydrogen. So if ammonia is stealing a chunk of your free floating hydrogen in the tank, then less will be detectable and pH should rise slightly.


-edit- Hang in there, your only 10 days in :) it could take a month for things to cycle through this way. But it will be worth the wait! Give it some more time and keep testing your water. I'd expect to see some nitrite readings within the next 7 days.


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