Dry hopping wont hurt but in my opinion it could potentialy reduce the life of the beer. Amarillo cent and simcoe are delicious tho! The choice is yours!
Hook up your march/chigger or even cheap sumbergibale aquarium pump and run some blc or 5 star beer stone remover through there in a continuous loop for a while. Rinse repeat and maybe you will have a usable chiller.
I recently inherited a Dudadesil ( DUDAHX-B3-23A-20ST ) how well do these work ? I will be implementing it onto a 15 gallon system. In up in MA so ground water for the counter flow will generally be on the cooler side ? Is it to small, will I have to recurculate back into the kettle ?