I was wanting to run them in a series. But some of you kinda verified my fear that one pump may overheat the other. But I am curious about this parallel filtering? Is there any problem with back pressure in that kind of set up, being that the two pumps have different flow rates? Also does that mean one output and two intake?
Oh, the plan was to just have twice the available bio filtration. Got a new discus tank and have an extra xp2.