since the installation of the chiller I have noticed quite a difference in sps polyp extention. The temp swing used to be about 3 degrees and now it is about .7degree. That heat exchanger really works well. I now know that it is a nessesity for acro development in a gh situation. Ive seen alot of new gh's out there and good luck to you. Luck is what you will need with no chiller
