Hello again everyone!

Well as some of you know I always have some kind of project on hand and this time I will be making a wet/dry filter for a future 125 gallon tank I will be setting up in the next few weeks. It will be a fresh water tank used to hold Discus. I know that sumps for freshwater are not as common but based off the positves that a wet/dry filter provides I think they would work great.

My goals are:

1.Increase water volume
2.Maintain steady water quality
3.Have a place to add peat in order to lower my PH
4.Simple and cheap

So far I sit at the planning stages and looking at all my options. As of right now I am leaning towards the use of a larger plastic container mainly due to the fact that I already have an external little giant water pump that I could use as a return pump but don't want to drill a tank.

That being said I will either make or buy an overflow box (again not drilling any tanks here)
My real questions come in here is what should the actually filter section look like? I have seen countless renditions of this all over the internet but I turn to the great minds of the box for further inputs!

I have seen a design that uses plastic drawers. The filter media is placed inside the drawers and the water runs through them (holes drilled between them) then a gap is left in the bottom and flow over the bottom of the tank (good spot for peat?) then in some cases baffles are added to increase water level and finally a return pump.

So as I said before questions are:

How to house media?
What type of media to use/works best?
Peat placement?
Any design ideas/drawings are welcome. I want to have everything setup before starting this project. Once it gets going I will keep everyone updated and hopefully provide images to go along!

Thanks
Striking

I would pack the sump full of drift wood just like you would live rock on a SW tank.

Ill share some of my freshwater sump experience with you but keep in mind i do NOT do discus at all, even though they are really beautiful! I have used a few different set ups with my fresh water sumps. Like you said before increased water volume and places to store things you do not want to see. The common clear plastic sliding shelf device works well because it is so versatile.. I use a home made tower with an egg grate bottom just above my water level to store my bio balls or pot scrubber alternative.. Above that i can store chemical filtration or crushed rock what ever i would like and i can change it if the need arises. and above that i use a polly fill that i get from walmart in a huge bag for like 4 dollars and it last me for months, draw back is that it is not reusable, but at that price who cares.. the main thing that i like about the large plastice tubs is the price.. if you are wanting to fill a large space with driftwood or peat or what ever a 50 gallon tub from a store is under 20 dollars. It is also alot more forgiving when you have an oops than glass is. but a plastic container will bow if not supported and over filled.. another thing to keep in mind is that a tank with a sump typically is a little cooler and a larger heater might be needed to keep your fish in their happy zone. I have always used drilled tanks for my overflow even going was far as drilling them my self or having them drilled by someone who has done it before.. If you go with a hang on overflow box just make sure to research the possible problems.. All that said i will not set up a large aquarium with out the aid of a sump for my fresh water i just love the versatility ease once set up and the ability to use cheap media. Hope some of that helped and you can always set up your sump out side and run it with a hose to see if the set up you chose will work how you planned, catch leaks, etc.

Thanks for your input!

I have nearly completed the sump setup and will have to post some pictures here shortly.

I ended up using a 55 gallon tank. I found some nice 1/4 Plexiglas to use as baffles for the sump. Picked up some stack-able containers and drilled holes in those. All my bio media will sit in the containers and flow down through the first parts then the middle will be where I will likely add some plants later. For now it will house two Eheim Jager 300watt heaters.

I then drilled the side of the tank and added an external pump to that.

Lots of room left for expansion of different needs and gives me the ability to change things around.

I will post pictures and do a full write up when I finish with the sump.

wow thats exactly what i would have done!! lol i really like the idea of plants in a sump its just such a good idea especially if you have plant killing fish like i do.. cant wait to see the pics! How did you go about drilling you tank? Reason i ask is because i watched 2 a 55 and a 20 long get busted last week... OH and one more.. why the external pump vs an internal pump??? i have always gone with internal because my moto is if it works try it again and again. Thanks!

I'll post further info in the write up but I just used a power hand drill and a diamond dust hole saw. I admit it was very nerve racking at first because I did not know for a fact if the glass was tempered or not. Lucky for me it was not. Just have to go slow and use plenty of water.

I used an external pump mainly because I already had one. I got a CL deal on a little giant pump worth about $150 for $30. So instead of buying an internal pump I spent about $30 on a hole saw and bulk head.

OK so as promised here are the build photos and a little of a in the making story.

As stated in the original post I wanted to add this as a FW sump to increase water volume and stability. If anyone has ever thought of doing this I will say that it was fairly easy. I will admit that I am a handyman when it comes to projects like this but it was well within the reach of anyone willing to try.

On with the build!
First gather materials...

Old 55 gallon tank (free off CL, Price varies with luck!)
Sheet of Plexiglas/Acrylic 1/4 thick but less would work (free from work)$20 at HD
Stackable containers (Wal-Mart special $4.50 a tote=$18 total)
1 3/4 in Diamond hole saw ($15 from glass-holes)
1 Inch Bulk head ($5 from glass holes)
1 inch PVC pipe ($3 from HD)
Misc PVC items ($10 from HD)
GE 1 Silicone x3 tubes ($18 total)
Little Giant return pump 2-MDQ-SC ($30 of CL **most expensive part normally**)
Overflow box $50 off CL (normally 65$ or you can make your own)
x2 300 watt Eheim Jager heaters ($60 total)
Some egg crate I had laying around ($5-10 at HD in light section)
and finally the bio-balls, I worked out a deal with the LFS that has a huge mess of these things cycled to buy them from their "used" stock. It cost me $75 total for these ready to go bio balls... now I know what your thinking! thing is I needed this sump up and running as soon as possible since I have fish being held by a friend who is looking to off load them as soon as possible...

You could also use pot scrubbers here, I found mixed reviews on them but believe they would work just as well.

Anyways I got half of a 35 gallon tote full for that price which when compared to a fresh batch is still saving a decent amount...

SO in total I have $284 invested in the sump. Now I will say this... Given that price tag it is getting close to some of the pre-made ones online but their size is much smaller and often without the bio-balls and pump.

OK on to the good stuff!

First before I got started I waited on the hole saw to arrive--ordered Sunday got Tuesday!
First time I have ever drilled a tank so this was a tense moment for me.
Turn on the hose get a decent flow going. Pick the spot on the glass where you want to hole and attach the hole saw to a good power drill (Dewalt 18V works for me)

Start at close to a 45 degree angle to get a notch started. As the notch deepens slowly tilt the drill upright. There is no pressure needed while doing this! the weight of the drill is more then enough to push down. You are grinding through the glass not cutting so just keep that in mind. The faster you go the hotter the bit gets and the less life span it has... so easy does it.
You will see I placed a towel at the bottom of the tank to catch the glass cutout, don't forget this step it would be horrible to successfully cut through your tank only to shatter the other side with the cutout!










So hole is cut out and everything look great!
Now install the bulk head!
Easy fit and the rubber gasket provide all the protection I need.





Now that I know the tank has not cracked and everything is going well it is time to reseal this only tank. I don't have many pictures of this but I took a razor blade and scraped off the old beat up silicone lining, cleaned it extremely well and then tapped everything off. Once tapped off simple run a bead of silicone down the seem and gently smooth with your fingers. **Remove tape quickly after putting down silicone or it with become part of the tank haha***


So I went to Wal-Mart and picked up my containers they are fairly cheap and have locking lips. I ensured they where stackable.
Took a 1/4 drill bit and made hole aligning the bottom of one tote with the top of another.


Now that I know how big the totes are I put in a sheet of Plexiglas to act as a baffle in the sump. This first one run from the top to 2 inches above the bottom of the tank. This baffle forces water to flow down through the totes and under it minimizing bypass.
(Tape and wood block used to hold the sheet where I wanted it while silicone dried)







Next is another baffle before the pump. This serves a few purposes. It determines the water level in the sump provides another spot for aeration of the water and makes a constant level in the middle of the sump. This middle spot is where the heaters or another misc equipment can be put. It may be made into a planted sump later.



I placed small strips on either side of the sheet against the glass to provide a better seal and to make sure the silicone would not give way under pressure.



Next I cut out the egg crate and placed it in the bottom of the first part of the sump. Then two small 2 inch strips and finally a top for it. It forms a small egg crate box. The totes sit on top of this and the water flows through it.

With that done I laid in the totes and made sure everything fit well.

Installed the two heaters. I will say that these heaters are extremely powerful! They keep things within .5 of the desired temp and that is with an open top to the tank and sump!
You could get away with one heater in there but I went with caution on this build and got two for backup and hopefully extended life.



The sump was up and running for a few days before I added the bio balls.
Once I filled the totes I placed them back in the sump and away it went.





With a little tweaking on the flow rates I am able to get close to full pump output. Something around 500+ GPH. The water coming out of the pump is very strong and i will build a spray bar for it to decrease the current it generates.

It has been up and running for a few days and I have to say the thing is an ammonia eating machine. I use pure ammonia to test it's rate of filtration and it can take 3-4 ppm down to trace amount within 6 hours.

If you have ever thought about building something like this I highly recommend it! It was a fun project and while somewhat costly I enjoy knowing I made something!

Best of luck to all you DIY'ers

Well the sump has been up and running for a few more days. The first fish went into the 75 gallon tank it is on for the moment until I can get around to setting up the 125. Anyways I can tell you that this thing will process ammonia like nothing I have ever seen. Still waiting on nitrite to drop completely to 0 but it is very close at the moment.

Nice job ! Congratz

Thanks, It took some time for sure but the flexibility I now have as far as adding special things such as bags of Purigen to rid the tank of any Nitrates is great! I have to say I have seen this done on both much smaller and larger scales and at least for the small scale this would be much less costly and easy to do. It could all be contained in a smaller plastic tote!

maybe one of these days ill stop being a cheap @$$ and get a diamond hole saw... lol