Hi, I am looking to buy a chiller to run on my 55g. I am going to upgrade tanks within a year or so, to at least a 180 possibly bigger. I dont wat to have to upgrade the chiller then too, thats why I have dual 400w MH on top f the 55g So when I get the bigger tank, only the Bulbs need replaced lol. Let me know what you have and How much!