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Old 01-16-2004, 03:49 AM   #41
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okay so wait should I get airline tubing stick it through the hole.. how far down should I go with it?

My current hole is 11/64. Ironcally the only drill bit that I am missing is the 5/32, I have tried the drill bit before it (the 5/64) but it was too small and created the super siphon effect, and the drill bit after is the 11/64 I am using now. What size hole is everyone else using?
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Old 01-16-2004, 06:48 AM   #42
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Yes, you can use the purple PVC primer to stain it purple, kida like instant coraline.
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Old 01-16-2004, 12:57 PM   #43
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Electrboes, I would start with 1/8" and work up towards 1/4" should do it for most. I can't imagine needing to go farther than say 3/8". The airline suggestion works for the gurgling noise if you end up removing the cap entirely (is that right? I've never used it). But with the right sized hole you shouldn't need to remove the cap.
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Old 01-16-2004, 01:20 PM   #44
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okay so wait should I get airline tubing stick it through the hole.. how far down should I go with it?
2" to 4" into the hole I would think. You will need to experiment with it. Try a long piece and start sliding it down. Air line tube should work but may need larger.

The Principle is to introduce all the air needed for smooth flow into the tube below where the water flows over into the down pipe.
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Old 01-17-2004, 11:36 AM   #45
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i made mine, much like electrbodes, with the small cup, but i used 3/4" pvc, as I am only allocating a Maxi 1200 to it (295 gph for the 55 gal). I can only get a slight trickle out of it. does it matter how tall the loops are or how low they go, relative to the tank lvl?
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Old 01-19-2004, 01:42 PM   #46
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in theory, the height of the loops shouldn't matter as there is much pull from gravity as there is push so it should all balance out.

what do you mean by a slight trickle? is the overflow not keeping up with the pump? I would imagine 3/4" should be more than enough for 300 gph. Make sure you have all of the air out of the pipe that goes over the top, thats the only thing I can think of that would slow it down...
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Old 01-22-2004, 10:40 AM   #47
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well make sure that the "T" is below the water line.. if I remember correctly
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Old 04-22-2004, 05:50 PM   #48
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I was thinking instead of running the collection cup along a table saw to make teeth, why not drill a series of holes all the way around it. Make it look somewhat like a honeycomb. I would say somewhere around the 1/4" - 3/8" size. You may have to experiment to see what gives you the best flow for your application.
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Old 04-22-2004, 07:17 PM   #49
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If the water does flow directly over the surface of the overflow cup, it will suck the water from just below the surface and leave the DOC film on top of the water
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Old 04-22-2004, 07:36 PM   #50
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Ahh, I see. Didn't think of that when I posted that last reply. The holes would then defeat the whole purpose of having the overflow wouldn't it?
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