cycle crash stopped stop help

Hello friends, I set up one 80 liters tank at 01/16 and I started to cycle. Setup: Basalt, 1 tetra wishper 30 filter, 1 thermostat adjusted to 34 celcius, PH 7 1 artificial ceramic(decoration) and 1 trunk (bought after measure ph near from 8) On day 17, I started adding Stability (daily at the...