11-25-2008, 02:17 AM
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A few issues with your sump design that I see.
A) your first bubble trap is far too tall. Your first baffle should keep the water level in the Inlet/Skimmer section at the required level for proper skimmer operation, and the bubble trap should be no more than an inch higher than the water level in your refugium. The cascading water gains too much momentum and will both disturb the sandbed of the fuge, and will cause too much water movement for pod populations to establish.
B) you do not need the bubble trap after the fuge. Add that space to your return section to increase your evaporation allowance.
C) I'd recommend against the sponges in the bubble trap. If they get clogged, it's going to be a big mess. As long as the baffles in the bubble trap are an adequate distance apart, a lot of the detritus that gets past the skimmer will collect in the bottom of the bubble trap. The farther apart the baffles are in the bubble trap, the slower the water will flow through it. The slower the water flows thru there, the more bubbles and detritus it will trap. I'd recommend between 1" and 1.5".
D) you'll want a shut-off valve on your return line as well. This will allow you to cut the water to the display while keeping the sump in operation. This is especially handy during sump maintenance and Macro harvesting. It allows the skimmer to clean the crap from the water that may get stirred up if you disturb the sand bed during the harvest.
Just as an added aside, do not use ribbed sump hose to plumb your system (like I did). The ribs cause alot of noise, not to mention, they trap alot of calcium carbonate precipitate and detritus. If you disturb the hose, the precipitate will break free from the ribs and be strewn about into the system. This could cause unwanted Cyano and algae problems.
Last edited by SKAustin; 11-25-2008 at 02:22 AM..