plumbing question 2 into 1 return on flex hose?

[strendo]

I just set up a 90g RR tank. It only has one built in overflow in it. I want to run two return pumps, one for the UV that's pretty low flow, and one for the chiller that has to be over 500gph. I've looked online but can't find a flex hose conector that plumbs both into my 3/4 hose to go back into my overflow.