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Old 04-28-2012, 02:11 PM   #11
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Here is the plan
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Old 04-28-2012, 09:17 PM   #12
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Design looks good, though I would make the refugium section a little deeper, if possible. Chaeto is a very simple, easy choice. It grows well, soaks up nitrates and phosphates, is easy to trim, and doesn't generally go sexual.
Gracilliara is another good choice, and when you trim it, you can toss a little into the DT as a tasty snack for any herbivores you might have. Caleurpa is popular, but you have to watch it to make sure it doesn't go sexual on you. I'm a big fan of decorative fuges, but since this will be tucked away, I'd keep the macro selection simple.
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Old 04-29-2012, 11:29 AM   #13
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I would not rely on a J tube to connect these 2 tanks. This is a disaster waiting to happen. If anything, drill them and connect them together with some 1.5" pvc. I would also not use any bio balls in the system if you plan on having live rock in the display, and corals/clams/anemones in it.
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Old 04-30-2012, 02:17 PM   #14
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What kinda off disaster are we talking about? I don't have the tools to drill them and I am on a strict budget because my hours just got cut at work.
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Old 04-30-2012, 07:01 PM   #15
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The tools to drill them are only a few dollars. That design above will have to have a pump perfectly synchronized to that siphon tube, or it will lose siphon and the display will overflow all over the place until the sump with the return pump in it is empty.
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Old 04-30-2012, 08:12 PM   #16
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In all fairness, that's a worst case scenario. U-tubes often work perfectly. BUT! Doug is right that it could lose siphon. If the flow is significantly lower than the tube is rated for, air bubbles will collect in the upper portion until it eventually loses siphon. Murphy states that this will happen 5 minutes after you leave for work and it'll have 8 hours to overflow and burn out pumps.
I wouldn't even hazard a guess as to the odds of this happening, but if the flow is strong enough, it will probably work just fine. I use an HOB overflow with a U-tube, and it took weeks of fiddling to get it working just right. I almost lost siphon daily for about a week. And because the tube is exposed to light, I am now getting algae growth inside it, which will need to be cleaned soon or (surprise!) it could lose siphon.
So, recap: It will probably work just fine. But the potential for disaster is there.
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Old 04-30-2012, 08:20 PM   #17
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Is a hundred dollars in tools (max) worth the cost of new flooring? My dt is drilled and so is my sump. Why chance it?
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Old 04-30-2012, 09:16 PM   #18
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A glass bit is about 15 bucks and a bulkhead is another 5. 3 dollars in pvc and your done. Not even close to 100.
That design will definitely not work because one of the tanks will have to be lower than the other also. I would drill them and sleep well at night.
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Old 05-01-2012, 03:12 PM   #19
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Well, no... The tanks can be at the same height. But the water levels in the two will always be slightly different (when pumps are running). The continuous siphon U-tube will always try to maintain equilibrium (water levels at the same height) but as the pump pulls water out of tank 2, the level drops, and water flows through.
I'm certainly not arguing that drilling is a far better idea, just whether or not this one will end in certain disaster.
Also, at OP, if you're really on a budget for this and don't want to shell out the $15 for a bit you'll use once or twice, see if there is a local aquarium club. Someone may have one you can borrow.
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Old 05-01-2012, 06:31 PM   #20
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Ask your LFS if they will drill your tanks mine charged me $10
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