Yup, I was kind of thinking of the 2 separate spraybars a well, but then that means another pipe running into the tank. 2 for the output and 1 for the intake. As for my 29G, because it's not really that big of a tank, I'm just thinking of using the canister filter, and run it to both the heater and CO2
reactor, and then save the 2nd external pump I bought for my 55G project. What I'm really looking for it getting rid of all powerheads in both the 55G and 75G by having a single external pump and a spraybar, and enough flow to eliminate dead spots, as that's where my BGA I was getting was starting at. Once I got good flow with 4 powerheads in my 75G, the BGA went completely away.
As for the pipe going through the canopy, that sounds like a very good idea you brought up. In a way, it's like a bulkhead, but just using a short pipe to go through the wood. And the wood it's going through is probably going to be a 2x6, as the base of the canopy will be 2x6's, and then above the 2x6's will be the rest of the canopy where the lighting will be installed, a solid piece of glass that slips in to protect the bulbs from the water, and a door on the front that swings open. Or maybe even 2 doors that opens like a cabinet. It's going to look really nice when complete. And probably be really heavy too, lol.
Glad you guys and gals are posting, it's giving me some really good ideas. Since I got an unexpected bonus at work this week, I think this weekend I'm going to get all the wood that I need for framing both the base and canopy. Then once I get everything framed, and ready for the cedar, then I'll get that wood. That way I know how much I'll need, and can get what I need. And if it turns out really well, then maybe I'll make a few that I can sell and get my money back, lol.