Hi,
Mine is 24 by 24H by 18W, so although the same measures, a different build. Its 3/8th but I have a eurobrace in the front and back. My builder said none was needed but I like to error on the cautious side. I have done 24in. sq. cubes with no bracing but always used 1/2in. glass.
I would consider the Tunze 9010 skimmer instead of the smaller model. My thoughts anyways. Someone here does run the smaller one but I would have to find his thread. He sems to like it also. I own a 9010 and have a review in that section. You can run the water height lower in the back then, if run in the sump mode. If run in the tank mode, it needs be near the top of the skimmer but of course the skimmer can be lowered on its brackets.
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Doug
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