You can purchase new intake screens for your Tunzes. It's not cheap (roughly $100 for the pair), but your opening will go from 50mm to 63mm. Your flow pattern will be much wider, and aiming the Tunzes will be less critical.
Am I messing with you? No. Keeping a moray in a tank that size in inhumane.
:hammer:
I forgot to add. The new larger intake screens are designed for the Tunze 6200. They are compatible with all Streams.