Pet Information > ASK Experts > Pet Fish > Freshwater Aquarium > too much ammonia?

too much ammonia?

23 16:48:26

Question
QUESTION: I began fishless cycling about 10 days ago using pure ammonia.  However, I'm a little confused.  My nitrites jumped to 5ppm, stayed there for a day, and then dropped back to zero 2 days later.  Seems great...except that the whole time my ammonia reading has stayed up around 5ppm.  My water is currently testing at 5ppm ammonia, 0ppm of nitrite, and 10 ppm of nitrate.  What would cause my ammonia levels to stay high even after my nitrites have spiked and fallen back to zero?
ANSWER: Hi Nate...
Have you stopped adding the ammonia?
If you are still adding the ammonia, then you will get a high reading and the nitrites will show zero. That means you are cycled. Nitrates at 20 sort of eat the nitrites so you won't see them anymore.
If that's the case, do a 50% water change, stop adding ammonia, test your water the next morning and add your fish if the ammonina zeros out..

If you already stopped the ammonia and you are getting high readings, then I still would do a 50% water change, test for ammonia the next morning, and if it is zero at that time, add your fish.
Let me know if you have stopped the ammonia or not, OK?

---------- FOLLOW-UP ----------

QUESTION: Joe -

I have still been adding ammonia...a little less than half of my 5ppm dose, every day or two.  I added some yesterday, and my confusion stemmed from the fact that 24 hours later it still tested at 5ppm!  I will do a large water change and see where that gets me.  Is it true that I should continue to add a little bit of ammonia to "feed" the bacteria up until I add fish?  I'm adding some peacocks and haps so it may be a few days until I can get them.  

Answer
OK,
Stop the ammonia at least for a day or two and get some readings.
If the ammonia finally goes to zero, then try and get your fish as soon as possible.
If you cannot get fish right away, you can actually add fish food to your tank each morning as if you were feeding the fish. This also creates small amounts of ammonia to keep the bacteria "happy".
I think you are the right track