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Imo the water should be pouring over onto the bail balls. Can you get a top picture? It's hard to see how its all working with the stand support in the way. In the refugium you should stick a bunch of caulerpa or something in there and add a light.
That's it from the top. I have mine fully under water do you think that will be a prob in the future. I've been having a look on the net and no one really is doing it this way. This is y I put it on here. This was what the shop told me to do cheers.