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Discussion Starter · #1 ·
Hey All,
I just bought a new 1200gph pump for my DIY wet/dry but it's too powerful for my skimmer and overflow tube.
The tank fills up faster then what the overflow tube will suck.

My question is, will a bigger overflow tube siphon more water faster then the 1" PVC one I have now....I've even tried (2) overflow tubes and it's still not enough.
Any ideas???

The overflow box drains more then fast enough so I know that's not an issue.

The last thing I want to have to do is restrict the pump's flow rate with a ball valve.
I can send a picture if anyone's unclear about what I'm talking about.

Please help as I this DIY project is almost complete!!!
 

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I would say try a larger overflow if it's an option, but I couldn't begin to tell you how large of a tube to use. A little bit of added diameter to a tube makes a huge difference in how much water will flow, definitely more than most would think for the little bit of added size, so go up in sizes slowly.

Oh yeah, where have I seen your avatar before? It looks familiar, I think.
 

· what up NINJA
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I have the same pump on my diy wet/dry. My overflow box is rated for 1000 gph.
The mag drive pumps water up 4' from the floor too the top of the tank, this lessens the pumps GPH ot about 1000gph so it equals out. The overflow box has two 1.5" tubes directed under the main tank to a 20L gal filter. The main tank is 190gal. The return line from the mag pump to the tank is 1.5" pvc. The problem I have is evaporation. When the level gets low the filter runs low also and the pump sucks in air and blows out air bubbles. my solution: on the return line I have a valve to limit the return flow back to the tank. I also have a hose hooked up to a faucet to refill the tank.

Here's some pics, starting w/ the overflow:
View attachment 44224

and the back of the tank showing the overflow tubes and return line:
View attachment 44226

return line w/ valve:
View attachment 44227

The filter showing overflow tubes, 20L filter, media, and pump:
View attachment 44228
 

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498 Posts
Discussion Starter · #6 ·
Thanks...But my skimmer and overflow box are DIY too and I don't know what GPH they'd be rated for.
However, I've just bought some 1.5" ABS pipe for my overflow tube and I'll use it along with my 1" PVC tube to see if it makes a difference in sucking more water.
Does your overflow box have a divider in it to keep one side of the box full of water all the time?....I'm also wondering if I've made this divider on mine too tall.

I really didn't want to be forced into reducing the flow back into the tank.
Hopefully this 2nd tube works out...
Maybe tonite I'll add some pics so everyone can see what I'm up against.
 

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putting a ball vaulve on the line returning isnt a good idea, it will put stress on the powerhead. btw, i have the same skimmer as you, you got it off of ebay, right. but i have a 1,000 gph skimmer and a 1,300 gph pump, at first, it was a little too powerful, so i just put a ball vaulve near the pump and just bled some water off back into the sump. but now what i do, is i just take a piece of wood and prop it in there, so that it keeps the tubes as far apart as possible, and has them tilting to one side, so it can suck out water faster. i will find a pic real quick
 

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Discussion Starter · #14 ·
Hey All,
I ended up installing a siphon tube made from 1.5" ABS pipe and everything's working great...No bleeder valves and no restriction what so ever.
I am a very happy man today!!!


I took some pics to share my DIY project with everyone.
Everything on my 200gl setup is DIY.... Including the tank and stand.

Right now there's (2) Fluval 404's, a 901 powerhead, and the wet/dry with a Mag Drive 1,200gph pump.
The wet/dry tower was customized from a Rubbermaid plastic storage container, with (4) drawers that allow easy access to the filter media and the 30gl sump tank is built from 1/4" plexi-glass. So I guess you could say my tank has almost 230gl of water running through it consistantly.

Not finished yet with the canopy, however I would be interested in hearing any feedback or constructive criticism...
 

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that overflow actually looks really good for a diy. that sump is also awesome looking. only suggestion is that id put more media in it, it dosent look like it has a lot, some filter pad in the top, few bioballs in the next two and lava rock in the bottom??
 

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Discussion Starter · #19 ·
The picture doesn't really show it well but it's funny you suggested all that.

The (4) drawers consist of the flowing:

Top drawer has the bottom cut out with eggcrate and filter wool on it
2nd is just the drawer with lots of holes drilled in it, acting as my drip plate.
3rd has bio balls in it (I still have room for more)
The bottom drawer has red lava rock in it filled half way.
 
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