hmmm....yes, once again you are correct. Hey, I fish Bluffers Park sometimes. Next time I go I'll let you know. Big salmon. They ruin my gear but too much fun not to catch. My friend Ron is on the way back from there right now. I need to look at the tank at Lou's Pet Shop again. I'm using that as a model. I'm buying the pumps, filter media, and sump through them. I have plenty of time to plan this out. I going to get rid of the RTC so I don't need to have it ready right away. This way I can keep the aro by himself. That seems to assure the longest lifespan. You know how that goes though. I very seldom see a large aro in a tank by himself.