I'm building a little 46 bowfront tank for my kids room. It's not drilled and not a big deal. I'm gonna be running a tunze 9004 DC skimmer and 3168 comline filter. My question is can I still put the heater in the 3168 if I'm using the osmolator inside the filter and if so what heaters will fit inside this I believe I read the titanium brs heaters are to big. Any help would be appreciated. Thanks