There's only 2 holes at the bottom of the OF, 1 - drain & 1 - return.
I would suggest to raise the the tee so that the top of the 90 degree elbow is about 1/2" below the bottom of the egg crate. Take the tee & cut off some of the top & bottom of it so there is only 1/2" of the slip in section left. Also cut down the top reducer so that it is flush in the top.
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