Did I Add Too Much Ammonia?

[BLUFOX]

im nearly 3 weeks into my cycle.in the last week my ammonia has been dropping to 0 in 24hrs.today tho the ammonia has spiked to 0.50ppm??? did i add too much ammonia?? will this ruin the cycle??
also i noticed that the nitrite has started dropping a little.

 

[magical trevor]

in a word yes if its a fishless cycle.

I think you should mibby do a water change and see if it drops any. Whats your other readings? (nitrate and nitrite)

 

[HayzH]

did you use the calculator tab up the top of this page in the blue banner to calculate how much you should be dosing?