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Discussion Starter · #1 ·
Ok. This is just an idea. But let me know if this has the basic principle of a refuge, I was thinking if I took a 20 oz clear pop bottle and put a holes in it filled it with macro algae maybe Some small pieces of live rock maybe even a sponge filter and then connect a tube to the top of the bottle to the bottom part of my powerhead that brings the water in. Wouldn't that serve as a little refuge and a secondary filter
 
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