Homemade Aqaurium Weir Siphon Overflow Box

First off, what is the world is an aquarium weir siphon overflow box?

Well, everyone knows what an aquarium is, and that I like my fish tanks!
Most people are familiar with a siphon – a hose that allows you to drain water out of a container over the side of the container.
A weir is basically a long dam where the water overflows for the full length of the dam.
An overflow box is a type of aquarium filter.

So, basically, I am making a dam, that siphons water out of a fish tank.
The neat thing about doing it this way, is that the siphon won’t ‘break’ when the water level gets too low, as the weir (or dam) will hold the siphon. Quite a clever setup actually. I wish I had thought of it.
I read about this probably well over a year ago. I did a quick search, and found the same site! http://www.melevsreef.com/acrylics/overflow.html

So, with a quick look over their instructions, I completely disregarded them as to measurements, and made up my own. I just wanted the concept.

So, after much scientific analysis, here are my measurements. Yeah, Yeah, I mocked it up in cardboard. I did actually take a measurement! I measured the inside of my 4″x4″x4′ nano tank. The idea is that I will make a ‘stream’ fish tank like nobody else has!


So, from the 1 measurement, I made it square, as an overflow box MUST be BOX shaped, or it’s an overflow rectangle, and, well, we just can’t have that. I started cutting away at my plastic.

This is a high-precision operation I run hear. Silicone my tolerances! I taped the two sides together, and cut them with a coping saw.

After many long, excruciating seconds calculating the flow rate for the whole contraption, I just held the damn thing up to the tank and eyeballed how high I wanted the water to be in the tank and made the weir element that tall.

Here you can see the start of the inside of the siphon element. You can start to see the difficulties assembly will incur, due to the various bits and pieces getting in the way of sealing the seams. It can really only be assembled from the inside out and be able to be sealed. (high tolerances, remember?)

This is what the completed unit would look like. It’s just taped together here, waiting to be cut apart and glued together.

This is what it looks like hanging on the side of the tank. Pretty cool looking, I think. I need to add the outflow pipes yet. But you can get the idea. The water will overflow the weir on the right side, inside the aquarium. The water will be siphoned over to the left side, where it will overflow the second weir into the outflow box.



Remember those high tolerances. Yeah, you know, measure twice, cut once. Don’t let the ruler slide around as you cut. I have a leak. I turned the thing upside down, and filled the siphon area to see if it will hold water. Nope, my work ‘sucks’ air. No worry. 100% Aquarium silicone to seal up the leak. **grin**

Making a FIFO canned food storage auto-rotating shelving rack.

Yesterday I made a shelf for some canned food. I have been eyeballing the soda in the beverage gliders at the local convenience store. After talking to the manager a few times, he said he would see if he could get some for me. Yesterday, we stopped in, and SCORE! He had half a dozen.

So, I started making the canned goods slider.

Plexiglass and straightedge
Brother supervising my cutting of the acrylic sheeting

I started with an old piece of plexi I had left over from my college days. It used to be the top to a home-made desk. I used it because it’s nice and thick.

Rough layout of the DIY food shelf rack
Trying to fit the shelves into the space that works well with the size of the plexi

Here I am trying to figure out what angle they need to be to work correctly.

initial testing the food shelf roller rack
The first try was a failure

I tried it out. Dismal failure. Not only did the tape let go – silly me for using painters tape, but the angles and heights where all wrong.

Assembled Can Roller Rack
layed out can roller rack

Here I have it set up with the right angles and heights. There needs to be a good angle with plenty of distance between the two so you an slip the can in back, and be able to pull it out up front.

riveted the parts together
See the rivet sticking out? The plastic riveted together well.

I riveted the whole thing together. The rivets have a nice, smooth head that doesn’t stick out very far. Bolts, screws, etc. would have given me fits to go through the sides like this. I would have needed to bolt up hardware on the bottom.

One side riveted on. The other side will keep the cans from wanting to fall out.

One side done! Lots of rivets. You see that it holds the cans up, but without the other side, it wants to tip out.

marking drill lines so the holes line up well
Neatness counts

Marking out the drill holes for the other side. It doesn’t need to be perfect, but lining up all the holes makes it look better.

Finished home made canned good rotation shelf
Load it in back, pull from the front. Sweetness!

Here it is all done. I zip-tied it to my metal shelf that hold the rest of my canned food.

I really like whole thing. It cleared up a lot of space on my shelving. It allows me to automatically rotate my canned food so it doesn’t expire before I get to eating it.