IMO it will depend on your particular setup of rock, decor and filtration in the tank. You need basically flow to keep detritus/uneaten foods in suspension long enough for filters to trap it, but don't have any blast that can push a seahorse against something and damage it.
Once set up, you will most likely just have to experiment with positioning to find what works best for your tank.
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Seahorses. Culture nanno, rotifers and brine shrimp.
Current Tank Info: Seahorses
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