what type of cleanup crew?

[da1jewfish]

for a clownfish breeding tank?
My buddy and I set up 2 55 gallon broodstock tanks and divided them up into 2. Now we are able to keep 2 pairs in each tank without aggression between each pair.
There is currently a 2-4" sand bed, 1 large piece of LR in each side of each tank, water is allowed to pass through between each side. 1 55 has 2 double power filters, the other has a single power filter and a wet/dry. Each tank has a timed light on top.

So what kind of clean up crew for a clown fish breeding tank?

Thanks ALL!