I everyone, I've got another newbie question. 
After introducing my sister's established filter media to my tank, I'm still not showing any parameter changes after four days. Ammonia, Nitrite & Nitrates still at 0. Is this normal? I haven't been able to find any ammonia I can safely use in my tank, so a couple of days ago I added some food flakes to keep it going but still haven't seen any changes.
Does this mean that her filter wasn't established when I got it? Should I take out her old gunky filter then and just do a fishy cycle instead?
Also, my tank is turning out to be impossible to keep at a constant temperature. In the mornings it tends to be around 76 degrees, but by evening it's around 80, and this is with the heater turned way down. Will this be harmful to any fish that I get in the future?
After introducing my sister's established filter media to my tank, I'm still not showing any parameter changes after four days. Ammonia, Nitrite & Nitrates still at 0. Is this normal? I haven't been able to find any ammonia I can safely use in my tank, so a couple of days ago I added some food flakes to keep it going but still haven't seen any changes.
Does this mean that her filter wasn't established when I got it? Should I take out her old gunky filter then and just do a fishy cycle instead?
Also, my tank is turning out to be impossible to keep at a constant temperature. In the mornings it tends to be around 76 degrees, but by evening it's around 80, and this is with the heater turned way down. Will this be harmful to any fish that I get in the future?