Can the Poly-Filter® be used to dechlorinate water or
break chloroamines apart?

NO! You must use chemical dechlorination before adding water to the tank. Chloroamines require either Sodium thiosulfate or other chemicals to split the chlorine-ammonia bond apart. Once the bond is split the excess ammonia will be converted into Nitrite (NO2-) and then Nitrate (NO3-) through Nitrifying bacteria.