I'm using a front curved 1.5ft tank to keep my CRS and at the moment using 2 DC fan for cooling. Not really planted, just some driftwood tied with freshwater seaweed. If i want to use a hailea 100~130 chiller, should i upgrade the tank size so that to improve the efficiency of the cooling effect. I know bigger tank using chiller will save more but between 1.5ft and 2ft can see big differences? I'm using eheim ecco 2234.