techreef and Bax -
Jonathan - How would you suggest I alter my pump configuration, I'd love to get your comments? As I see it, I need 1 pump for a return from the sump, and another one running my CL. The only way I can see getting around having 2 pumps is putting another powerhead in the tank, which I don't want to do. The Mag12 running my CL has been pretty low-maintenance, considering I've only cleaned it and/or changed impellers 3 times in the last 15 months. As far as heat, I think I've got that problem solved. The temp probe-controlled fan does a good job of keeping it cool in the summer, and there have been several nights already this winter where my heaters have enjoyed the assistance of the in-sump Mag pump and the CL pump.
Check out
this thread about my gigas clam and let me know what you all think. Here's a pic to tease you about the topic.