Yes I went with a ecotech M2 so 2000GPH I’m thinking will work well. Both items on manifold run super low flow around 200gph so think I should be good.The plumbing looks great. For the return pump I would of come straight up and out and not used the bulkhead hole. Purely to eliminate the 2 extra turns which reduce output since you’re running a manifold off of it and to keep removal simple for maintenance. But if the pump is oversized for tank and the manifold then you should be good.
I still have to add all the unions to make modular but once done it will be very easy to take apart hopefully