Your going to have lots of flow with the sump setup, Ditch the canister all together, you wont need it at all and it will just take up room and add more to work on which is not needed, Keep it simple, A sump only needs to have 3 thing,
1. A place for the water to enter the sump and get cleaned for Mechanical purposes
Means to accomplish filtration step one-
-Filter socks (These will polish your water down to 1 micron if you so want, but the human eye cants see that small and they will clog super fast) If you want really clear water try 100 micron socks
-Sponge (These will polish your water as they make fine and less fine stuff you can use)
: Whatever you like but those are the main types used that I see, I really like socks myself
2. A place for the water to go through Bio media to take care of the Biological filtration requirements
Means to accomplish filtration step Two-
- Bio Balls
-Pond Matrix
-Scrubby pads
-Bio reactor/ fluidized bed with bio media that tumbles and cleans its self (No maintenance if done correctly)
-Lava Rock
:And many more ways of doing Bio filtration
3. A place for you water to pass over the heater and go into the return pump
-Make sure whatever media you chose it can not get into your pump and break it. (pump came with a screen use it or build one out of PVC)
= You do not need dividers but can have them if you want, Keep is simple and make it easy to work on. With my sump I clean my socks and that is all I do, Once to twice a week and done, Feed and enjoy the fish.
Other Tips, Take your stand Tall, Yep make it easy for you to maintain your system, if its easy you will do it better and keep up on it, if its hard to do and a pain you wont want to do it. All of my stands are taller to make it easy to work on them,
Sit in a chair or stand and use something to measure where you think is a good level for the bottom and top of the tank, this way you can image it at that level where you are siting, think of sand in the tank as well that might block view, then see about how high you can go to still fit where you want it, make it as tall as possible so its easy to work on but just right for your viewing pleasure.
Hard Plumb everything, will make it clean and nice and great flow, use PVC Primer, use Unions as well so if you need to work on something you can, add a valve if you want to be able to turn flow off or make it so you can have a line going out for a water change or what, think ahead of how you really want to have it long term to make is super easy to work on,
I hope this helps you a little, KEVIN
PS, All my pumps are first Gens, All work great and not a problem at all