HELP!!! Overflow box overflowing

Steve Maxwell

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Hello,

I'm starting to panic! I've been working on getting the equipment set up for a 75G and I finally just got to the point where I have what I need (so far) and have gotten the thing plumbed...but once I started to fill the DT I've discovered a HUGE issue.

So I have a Synergy Reefs 16" Overflow on my tank. I also have an Eshopps R-200 refugium/sump. I have the plumbing set up in a modified BeanAnimal like in this post:

http://www.reefcentral.com/forums/showthread.php?t=2546162

So when I start using an EcoPlus 396 gph pump to fill up my DT, everything goes well until I get to the "teeth" of the inner overflow box. The water starts flowing into the rear overflow box, but doesn't appear to be going down either the primary or secondary drains. The rear overflow keeps filling until it starts flowing the the emergency drain and then the rear box overflows! Here are some pictures of my ugly plumbing job (my first attempt):

Plumbing%201.jpg

From left to right...1) secondary drain (running into a bulkhead on the sump/refug) 2) emergency drain running to above the equipment compartment 3) primary drain (running into a bulkhead on the sump/refug)

Plumbing%202.jpg

From left to right...1) Primary drain 2) secondary drain

Plumbing%203.jpg

From left to right...1) secondary drain 2) emergency drain (tallest) 3) primary drain (shortest)

Some things I've noticed...1) the value on the primary drain is all the way open 2) When I went to bed the rear overflow box was totally full...when I got up this morning it has drained to the bottom of the primary intake 3) Yesterday in one of my attempts...when the rear box was full to the top, I removed the primary drain plumbing in the back of the box and the water drained out extremely quickly.

So I don't know if I have a problem with the overflow, the plumbing, the sump/refugium, the whole set up all together. HELP!
 
Simple. You need a small hole drilled into each of the "u" shaped pipes. So the full siphon and partial siphon tubes. Make sure the primary (full siphon) is shorter than the secondary.
What's happening is you have an airlock in the drains and water cannot get down into them to create the siphon. Adding the air holes in the tops of the pipes will allow them to equalize.

Everything else looks like it should be fine.
 
Last edited:
Whew...in my first try at this I had a hole in the secondary pipe but not the first but I ended up switching up the equipment. Do you think a 1/4" hole in each would be sufficient?
 

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