I ordered a 10' frag tank with Synergy over flows (one on each end) back in January. Every since then, I keep seeing these issues. I will be taking delivery next week some time. Guess I will "dry fit" it for testing or something before I glue it all. I dunno.
Well, I'm not sure about your tolerance for noise, for me it was unacceptable but for others, they will never care. I like a surging flow, I have run all my tanks that way and if somebody would make a wave box that doesn't vibrate to death and isn't ugly I would run one. With this overflow, I can not run anti sync reef crest or the overflow gets too noisy for me. I ended up settling with how I placed my pumps and settings along with a couple of adjustments so now I can't hear it at all.
The issue simply comes down to the box on the back of the tank being lower than the overflow in the tank itself. MM does not have this issue.
@Joe Glass Cages I know you've said others run these without issue, but I wonder how many of those folks are pushing 100+ times flow in their tanks. Synergy overflow may be fine for a mixed reef tank but useless when the water is raising and lowering due to the waterfall it creates. The videos they show of this overflow clearly show the flow is not surging at all or it will waterfall.
This is the only item I would change from my build with Glass Cages
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