Nice to see another seahorse keeper here, or soon to be seahorse keeper.
Some advice, don't link it to your reef, it should be fine on it's own. Most species like a temp between 75-79 degrees Fahrenheit depending on what your getting. Some things like Capensis, etc. of course need lower temps. Erectus, Kuda, Reidi, (the more common types) are in the 78 degrees range. Make sure your temps are stable at all times; too big of a drastic change may let diseases spread rapidly. Gas bubble disease, and large white bumps are the two that i've seen lately come in in tanks with big temp swings.
As for the current, generally, lower currents are the norm. In my tank though, I have an xp1 shooting a direct flow of water on one half of my tank. My seahorse actually seems like like sitting in teh current occasionally. If he needs to rest, he just goes to the other side for a short time. The current is still more than an average HOB filter on that side, but he seems okay with it. Try the seahorses out, and if they don't like it, try adjusting.
What species are you getting? Captive bred or wild caught (hopefully captive bred)?
Nice to see things are coming along but remember, don't do this too fast! Lol I just read through a majority of these posts so hopefully I read it right
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