Could Dosing ferts cause a ammonia spike?
Let me begin by saying I am brand new to aquariums. I started my tank roughly a month ago, planting from the start, full bioload from the start with tetra safestart. About a week in from inception I started seeing my ammonia and nitrites read 0 consistently, these readings were like this until today.
Two days ago, I started dosing fertilizers based off a modified EI dosing regime for excel/medium light tanks that I gathered from Tombarrs site.
I started seeing ammonia levels at .5 ppm, and nitrite levels at .25 ppm today and am unsure of where these appeared from.
My question is this. Considering I am unsure if my aquarium is 100% cycled (since to me its plausible the plants were eating up the ammonia quicker than my fish could produce), would dosing kh2po4 and kno3 cause ammonia and nitrite spikes if my plants prefer the fertilizers over the waste provided by my fish and its food?
I gave my fish an extra bit of food yesterday and today (though nothing they couldn't finish); could this also be the sole cause of the spikes? Should I stop dosing?
I just did a 50% water change, and am uncertain of the relationship between ammonia plants and fertilizers.
Any insight would be appreciated.