if i top up the water in my tank due to evaporation or if i do a water change "during cycling", which water conditioner should i add??? TopFin (helps neutralize harmful ammonia, chloramine and chlorine. Also remove copper and other heavy metals) or Nutrafin Aqua plus ( just removes chloriamine , chlorine and heavy metals and coats to protect scales and fins.) Because i'm cycling my tank, should i use the "topfin" brand because it states that it neutralizes ammonia. Or would that be bad? would that leave no ammonia for the bacteria to feed on?