I have a 10g container with sand, chaeto & caulerpa in it. No rock at all yet. I installed 2 bulkhead fittings in there with returns back to my sump so that i had a safe second, just in case the first one wasn't enough. As it turns out, it wasn't really enough because the water does hit the very bottom of the second overflow out of the fuge. My input pump is just a little on the high side, I think, but it is a really tiny pump. As a safe second (third?! LOL
) I've also got a shut off valve in there (thanks Darin @ CaptiveReefs). It is working well. I've had it setup for about a month now. My trates run a steady 7 with it. I also run mine on a 24hr light schedule, though I don't think you need to do that with just chaeto. It won't go sexual on you so running it opposite your tank would probably do well to keep your pH super stable. Good luck with the hair algae battle!
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