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Old 09/02/2009, 10:39 PM   #1
mojo~
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Mojo~'s DIY Skimmer Build

OK OK, No I am not out to make skimmers. But I am going to make myself two skimmers. One cone and one cylinder.
I have had so many skimmers and now its time to make my own and bring all the things i like into one. Well the best I can with the tools available.

Still not sure of everything but I do have some drawing done up on cad. most pretty rough as I will have to see what I can do with my imagination yet.

Well just for fun I thought I would see if I could make a bubble plate before I went further. I actually already ordered some acrlyic and pvc to make this thing. It will be heavy. 1/4 cast body on the cylidner skimmer with 3/8 inch base and lid plates.
The cylinder skimmer will be 6 inch body. The cone will be 8 inch base.
um lol here is the bubble plate sample.




Gotta start somewhere. tHe actual bubble plate will be made from 1/2 in cell cast.


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Old 09/02/2009, 11:38 PM   #2
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before you doing the bubble diffuser :
1.what are the pumps you plan to mod on those skimmer
2. what the neck size you plan on those skimmer
3. what is the height of the skimmer boody
4.Ricric or In sump style

as for the bubble diffuser leave it for the end since you will may need to make more holes or use different column height.... you want to test the skimmer without it and then to play with that as needed

good luck


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Old 09/03/2009, 12:07 AM   #3
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Oh I have thought about all that. I just made one just see how it would look. But to answer some of your questions.
Being the skimmers is for my 57g rimless. I plan on somthing between 700 and 1000 lph. So either a tunze hydro or aATB mini airstar.

Neck will be around 4" +- .25 ish depending onpump.
The cyclinder will be around 12 inches. I know it seems short but overall it will have more reaction area than most popular skimmers in this size range.

and in sump for sure. No recirc for me. Just never been a fan.


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Old 09/03/2009, 12:08 AM   #4
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Did I mention I drilled the bubble plate by hand.


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Old 09/03/2009, 12:13 AM   #5
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But I will make several plates when said and done. I have measurements from other skimmers that pull this much air and water. I have a pretty good idea what I will need to do to get it to work. If nothing else I can hop on the phone and maybe some friends I have made here can help me out. Its pretty nice having people like Victor (ATB),Jeremy (premium Aquatics) Jon (Warner MArine). And I am sure I could call others lie Jeff from MS as well if I have some question s . all very knowledgable. Really makes a project like this kinda fun and informative.


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Old 09/03/2009, 06:02 AM   #6
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Subscribed ,should be interesting.



Last edited by GrampaDon; 09/03/2009 at 06:36 AM.
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Old 09/03/2009, 06:51 AM   #7
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Very interested in seeing the pvc neck transition that you come up with.


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Old 09/03/2009, 07:36 AM   #8
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I did make a drawing on Cad. I took a picture with my phone.I can post a pic. its kinda hard to see. But right now I am waiting for the stock to show up. I still need to get the acrylic for the neck. Well if nothing else it will make one heck of a paper weight. Should be a heavy skimmer. lol.


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Old 09/03/2009, 07:37 AM   #9
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LOL, you'll have something to hold all of those printed off drawings down!


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Old 09/03/2009, 07:47 AM   #10
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Well here is a picture of the transition plans for the PVC neck transition. This will be made out solid pvc block. Side view



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Old 09/03/2009, 07:48 AM   #11
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The Lip on top for the 4 in neck is 1/4 in . THis allows for the nick to fit in there and make for a smooth transition.


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Old 09/03/2009, 08:13 AM   #12
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For those of you who have a hard time visualizing it wil look similar to this but the one I am building is a little thicker/taller



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Old 09/03/2009, 09:35 AM   #13
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If you can melt piece for acrylic to make a Con funnel straight one it will be better . there is some few post here how ppl did them it's easy and will work better than the one you want to do, also try to make it at least 4"-5" high

as for the neck i was recommend to go with 4.5" ID since the skimmer body to short and you will need a wider neck to deal with bubble size....or if you already got the tubes... do not cut the neck yet ..... i believe that 10-12" length will work good but the best is to try the all tube and to see where is the bubble start braking when you run the skimmer this will give you good idea what the size of the neck need to be when it's run with the pump you decide, like that you will be sure no issue with flood , it will help you to control better on the bubble size and will give you the correct point where to cut it when you want to skim dry or wet...

the bubble diffuser will help you to control on the pump air and flow .... but if you wll build the skimmer and test it as i said you will see that you will not use the bubble diffuser since the skimming performance will be alot better.


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Old 09/03/2009, 10:13 AM   #14
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I thought about not using a bubble plate but more of a inner cone kinda like the super marine skimmers do with a bubble plate. I ll have to test it out and see. I want to be able to take it apart as I make changes. We will see how it turns out. I am actually making two skimmers so it will be interesting. Once cylinder and one full cone.


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Old 09/03/2009, 10:36 AM   #15
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you can make them removable it's not big deal use one ring for the skimmer base and plate for the bottom with O ring between and you done.If you will go with funnel con on the cylinder body you will see that it will perform almost the same. and yes as for bubble diffuser ppl lock on that but truly is killing the performance ....turbulence not effect on skimming performance if you mod the skimmer right.... when you will do the test you will see that i am right about that.... this toy without bubble diffuser perform twice better than with the diffuser....



<



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Old 09/03/2009, 04:30 PM   #16
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so is that a dyi cone you made? looks good. Looks like you would get microbubbles as low as the air mmixture is.


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Old 09/03/2009, 04:44 PM   #17
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Yes it build form 3/8" cast acrylic and i got 3 of them , no issue with any micro bubble when they run correct. also it's depend on feeding to.... here is another one smaller run under my tank :14" Base x 34"Height x 6.5" Neck Diameter feed from 300GPH up to 900GPH (now feed with 900GPH) pull from Minimum 40LPM and can handle 75LPM no prblem with micro bubble unless feeding and breaking back again.you can see it run with the bubble diffuser without it is perform better also it's Ricric Style to. Hope to have some time to test on them also DC pump that i got to compare performance.





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Old 09/03/2009, 05:42 PM   #18
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great work. Well I hope mine turn out that well.


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Old 09/04/2009, 09:19 PM   #19
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ok more parts came in today. I got some starboard to play with. And I got my cylinder body today as well. I also got the PVC block to make the neck transition. The parts are coming in.


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Old 09/07/2009, 08:13 AM   #20
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Alright just a quick update.
Here is a parts list that I have and the machining starts this week.
6" cell cast tube 16" long 1/4 thick $35
5" tube 12 in long $9
4.5" tube 12 in long $8
4" tube 12 in long $7
3/8 thick black starboard $15
3/8 thick grey pvc $10
2 inch thick 10x10 pvc block $80

Ill take a pic when I get a chance of the materials I have gotten so far.
Should start coming together later in the week.


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Old 09/07/2009, 09:39 PM   #21
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well here are the pics of some of the material I had ordered.






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Old 09/07/2009, 11:56 PM   #22
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Try to keep this 16" tube all the way instead of 12" that you want to do. i hope you have space in the sump for the height but it will be better than shorter one .if you can do the Funnel con shape about 4" and the neck about 8" length you will be around 30" high but if you have the space for that you will be able to play with the Sicce pump or the Laguna pump and you will get a very nice skimming result . if you don't have space do the funnel about 2" high and try to keep the neck 8" ... remember don't cut the neck until you test the pump with the skimmer in external sump like that you can see exactly where is the best point to trim it....


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Old 09/08/2009, 08:30 AM   #23
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Well I dont have room for 30" First thing on the to do list is machine the piece of pvc for the bottom of the collection cup.
The skimmer isnt going to be a monster as It is for my 57g rimless. I figure it will handle 700 to 900 lph with a 4 to 4.25 in neck.

Once I get the machining done on the piece for the bottom of the collection cup I plan to work on the base and bubble plate of the skimmer. And from thier I can figure out the height of the skimmer body and then the neck size.

So you think the neck should be 8 in long? I guess i ll have to play around with it. I may just put some water in a tote to play around with it. I can just dump my nog from my tank in there. lol Thanks for the suggestions. Gives me more to think about.


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Old 09/08/2009, 11:40 AM   #24
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Mojo

Skimmer never collect everything you have 57 gallon tank and when the skimmer will work you can make easy test to see that i am right about that ......if you put hang on filter on top of the tank with white filter floss you will see that after 5 minute the filter become dirty and get into brown color like you nog color.... so as much as you collect there it will be better.

For the bubble diffuser plate i don't know the holes Dia. you want to do but when you do the holes give some space incase you will need to re drill to wider holes if you will see to mach back pressure on the pump....

As for the neck always longer neck better since you able to tune the skimmer more.... but it's also depend on the pump and the air/water flow.... because of that i suggest not to trim it just after you run the skimmer... you can see in this image a long neck that i add on high skimmer ....on this skimmer it was hard to control on the foam with standard neck size and i change the neck from 8" to 17" and i was able to play with the foam and skim produce wet/dry with a better result.... i also increase the neck on my other skimmer (you can see it inside the stand)and the result become better to.




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Old 09/08/2009, 11:55 AM   #25
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mojo i see a problem your gonna occur when gluing that stuff it's extruded....optix to be exact your most likely gonna see some crazing in there be prepared to prolly use 16 or 40/42 preferably....not sure what you got or plan to use when you weld it all up.....but it's something to think about anyways..


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