Well the spray bar should actually be as low as possible to duplicate the River Tank Manifold design and create current along the bottom of the tank. Keeping in mind that I will run about 2½" of sand substrate, the spray bar should be about 4" above the sand in the end. I'd like to go lower, and it may be possible to do so. But I was impatient and wanted to glue and paint the return line to get it installed.
I've become more of a fan of air pumps and air stones recently. They're a necessity when you're keeping young cichla in 90[SUP]o[/SUP]F water. I'll most likely run an air curtain along the back wall. I've also thought about running a couple of AC110 HOB's strictly for biological filtration and they would probably accomplish the task as well. An emergency battery-operated air pump is never a bad design feature in case of a power outage though.
I've become more of a fan of air pumps and air stones recently. They're a necessity when you're keeping young cichla in 90[SUP]o[/SUP]F water. I'll most likely run an air curtain along the back wall. I've also thought about running a couple of AC110 HOB's strictly for biological filtration and they would probably accomplish the task as well. An emergency battery-operated air pump is never a bad design feature in case of a power outage though.