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My DIY Algae Scrubber


Eugenereef

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So after reading the thread from markdadof2, I decided to make one for myself. I did have some major hair algae problem, but I think it as due to the (I think) phosphate leaching out of my BRS rocks and generous feeding! Anyhow the rocks are cooking right now so I figured I might try this out scrubber that may help me with my feeding habit!

 

So here goes:

 

Total cost was less than $30.00. My major problem was the space under the tank and open area to hang the scrubbed in the sump. There was a four inch area between skimmer and refuge where I could fit this thing. So I build two support structures with scarp acrylic bought from the shop in Eugene for $4:00. Below are the pictures in the series how the scrubber was made:

 

First I made the base of the scrubber with two sides that could lock the scrubber in place:

 

IMG00380-20111119-1150.jpg

 

Then I made the two side supports that would hold the net for alges. I taped two equal size peices of acrylic and drilled a 1 1/4 inch hole with hole saw:

 

IMG00381-20111119-1206.jpg

 

IMG00382-20111119-1206.jpg

 

Then I glued the two side supports to the bases I had created earlier:

 

IMG00383-20111119-1223.jpg

 

And this is how the are going to sit on the sump:

 

IMG00385-20111119-1224.jpg

 

Then I joined the two pieces with another piece of acrylic that serves as a back splash and keeps everything locked in place:

 

IMG00388-20111119-1250.jpg

 

IMG00389-20111119-1250.jpg

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Once everything was glued and ready, it was time to make the water channel:

 

IMG00390-20111119-1251.jpg

 

The 1 1/4 inch pvc pipe was marked for the right places to make a 10 inch slit:

 

IMG00391-20111119-1302.jpg

 

And a slit was made with dremal mill tool:

 

IMG00392-20111119-1305.jpg

 

IMG00401-20111119-1401.jpg

 

And prepare the plastic mat that was cut to 10 inch width with two notches at the top for it to fit in the channel:

 

IMG00395-20111119-1310.jpg

 

IMG00396-20111119-1310.jpg

 

And did a trial fit:

 

IMG00397-20111119-1311.jpg

 

And then everything was trial fit together. I used shower curtains to hold the mat in place:

 

IMG00398-20111119-1338.jpg

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Then I added two stops and brackets to hold the front splash guard. I did not want to glue as it will make it hard to remove the algae laden mat. This way I could remove the front splash guard when cleaning the mat:

 

IMG00399-20111119-1359.jpg

 

IMG00400-20111119-1400.jpg

 

Then it was time to put it to work (scary):

 

IMG00403-20111119-1425.jpg

 

I'll post an update in a few weeks how this new addition to my tank is doing :)

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i have a friend with this same design with the screen at a slope in a rubbermade container and it works great.obviously yours is more astheticaly pleasing not being in a container. he does two smaller screens and rotates wich one he cleans so there is never any sudden fluxes in nutrient uptake.thanks for the swet setup pics.:)

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Very nice and clean looking design! From my own experience with algae scrubbers and research I have 3 observations that you may want to consider.

 

1. You may need to try to shield the light from right where the screen and the pipe come together at the top. If you don't you may notice that the algae will clog the slit at the top and make the flow irregular.

 

2. If possible you can use 2 mats tied together with some fishing line. This will allow the algae to stay seeded between the mats when you clean it and make the scrubber far more productive.

 

3. I didn't notice if you did or not but if you take the mat and lay it flat on a surface and take any hole saw and just scrape the surface of the mat to rough it up. It will give the mat a slightly rough surface and serves two purposes. First it gives the algae something to adhere to since the mat is smooth the algae will slide off and second since it is a rough surface the algae pores will stay seeded in the mat and grow faster after cleaning.

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Thanks guys!

 

Both Badxgillen and Barecuda made some very good points.

 

he does two smaller screens and rotates wich one he cleans so there is never any sudden fluxes in nutrient uptake

I am going to split the screen in two 5 inch strips and clean one at a time!

 

You may need to try to shield the light from right where the screen and the pipe come together at the top. If you don't you may notice that the algae will clog the slit at the top and make the flow irregular.

 

2. If possible you can use 2 mats tied together with some fishing line. This will allow the algae to stay seeded between the mats when you clean it and make the scrubber far more productive.

 

Excellent suggestion. This will also somewhat thicken the mat. I made the slit a little bit wider keeping your point in mind about algae clogging the opening.

 

I didn't notice if you did or not but if you take the mat and lay it flat on a surface and take any hole saw and just scrape the surface of the mat to rough it up. It will give the mat a slightly rough surface and serves two purposes. First it gives the algae something to adhere to since the mat is smooth the algae will slide off and second since it is a rough surface the algae pores will stay seeded in the mat and grow faster after cleaning

 

Yes, I actually did score the surface of the mat with a brass brush ring (I don't know what the technical name is!) attached to the drill.

 

The whole thing took about 2.5 to 3 hr to complete. Its a really easy project for the folks who keep battleing with hair algae. I don't know if this would work or not, but the concept sounds very logical and scientific to me :). So here we go with the experiment to verify it. :)

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Not sure about the split screen idea. From what I know and have researched you NEED to clean these weekly so unless you are going to offset the cleanings by a few days I think the maintenance may be a pain. By my experience if you do not clean it weekly the algae will either sluff off or the under layer dies and the nutrients it has collected are returned back to the system. By the addition of the second screen back to back you reduce the time needed for the algae to start regrowing and your weekly maintenance will be reduced.

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Not sure about the split screen idea. From what I know and have researched you NEED to clean these weekly so unless you are going to offset the cleanings by a few days I think the maintenance may be a pain. By my experience if you do not clean it weekly the algae will either sluff off or the under layer dies and the nutrients it has collected are returned back to the system. By the addition of the second screen back to back you reduce the time needed for the algae to start regrowing and your weekly maintenance will be reduced.

 

I have a refugium too and so I am expecting to have less of algae. That said, I thing having a split screen and spending 15 mins every 3 days is not that bad. Its just take the screen out, scrub it under tap, dry it and put it back on the scrubber. removing screen alternatingly may keep the nuterient cunsumption constant. Lastly, if this fails :) (afterall this is an experiment) I'll further modify it to address the issues as they arise with the help of people here on this form. You guys have already pointed out two good modifications to this project. :)

 

OK, now I definately gotta get mine on my coldwatert tank today.

Good luck. Its really simple and quick.

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Good luck. Its really simple and quick.

 

Yeah I have my plumbing list already made for a trip to HD tomorrow.

 

Already picked up 2 sheets of the plastic canvas in clear. I have a 19" high x 28" area to fit the ATS and hang my plastic canvas from, so I think I am going ot get a 3rd sheet and cut them all down an inch or so. That way since I'll only be able to light it from one side I will have 3 seperate algae sheets and I can rotate through them.

 

I will have a total of 384 sq inches of surface area for algae to grow on.

 

It'll be lit with natural sunlight from a north facing window (so not a whole lot) and an LED array I had laying around.

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Nice thread!

 

Once I get things moved over I have plans to add one as well, I have always wanted to add one since running across Santamonicas thread 3 years ago, just never had a place for it.

 

Also interested in where you got the screen, I figured a craft store would sell it but I have not searched.

 

Another great DIY build/thread -(clap)

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Cool, Thanks guys, glad I added extra supply lines on my manifold, already used two of them so this will be the last "add on" gadget I have a water supply for!

Oh yeah, great thread, have to tag it somehow so I can find it again

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Managed to take some pics of mine all set up, now just gotta wait for the algae to grow :D I think I am going to build a 30w LED floodlight similar to my 50w and put it behind the tank for additional lighting if the natural light thing doesn't work out.

 

Here is the lobster tank I am using as my "sump" for the 200 gallon main display tank. You can see the window behind the tank.

 

IMG_20111122_171921.jpg

 

 

 

Here's a closer pic of the opening to the filtration area where the ATS is housed. You can see just the top of it in the pic.

 

IMG_20111122_172232.jpg

 

Here's a top down pic looking at the back filtration area where the ATS is.

 

IMG_20111122_171953.jpg

 

IMG_20111122_172020.jpg

 

Pic of the ball valve to adjust the flow rate, and the union so I can pull the hole thing out.

 

IMG_20111122_172142.jpg

 

Used a spare piece of PVC to brace the capped off end so that when it gets coverd in algae it doesn't put stress on the joints.

 

IMG_20111122_172159.jpg

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