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Old 10-15-2004, 07:15 PM   #1 (permalink)
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Default DIY filter pumps

I am currently working on a DIY canister filter for my 10 gallon. I am wondering what types of water pumps are out there that are external and inline, in the 125-175gph range. I would rather have to slow down the current than not have enough. This filter will have a built in CO2 reactor to make life simpler so a little higher gph would be fine. Any suggestions other than Eheim's? I find them to be a bit expensive. Are there any power heads that can be used externally?

I would like something on the output side of the filter and I don't really want a pump/power head in the tank. The canister itself is small so where would only be room inside for a small powerhead, but they don't have the gph I want. If I found something to put into the filter itself, how have you DIYers found to get the cord out. I have thought maybe a small reversible (as the outlet is on the bottom of the filter, as is the inlet) powerhead would work but how to get the cord out without leaks?

Any help is greatly appreciated. I will post pics when I get it going
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Old 10-15-2004, 07:47 PM   #2 (permalink)
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All the DIY cannisters I've seen online have been in the Rainbow vein with an external pump pushing water through the cannister. For this I would guess any reputable pump will do. You might try browsing the reef boards to see what holds up well for them.
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Old 10-16-2004, 03:05 PM   #3 (permalink)
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Anyone know if Pentair Aquatics Quiet One 800 is a suitable filter for dry applications? I can't really tell from their description. They say the intake is a screen but they also state how the quiet one's have special cooling chambers for dry operation. The online catalogs always list this line of pumps as suitable for wet or dry applications. Does anyone know more?

The price of this is great and the output should be perfect for my application.
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Old 10-16-2004, 05:26 PM   #4 (permalink)
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Looks like it has a 1/2" MPT fitting for the intake so you'd need to buy a suitable hose barb to screw into it. I've never used one personally so I couldn't tell you if it's quiet or not.
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Old 10-16-2004, 05:54 PM   #5 (permalink)
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Nice! Thanks Bill. I did a few different searches on this, even went to the Pentair website and nothing was said about it either way. I have email Pentair about this and if they confirm the 800 will work inline I will go with it. Otherwise I might use the 1200, although thats alot of flow. Big Al's has the 800 for $16 and the 1200 for $18, plus shipping of course. That would bring the total of my canister filter to about $40, cheaper than anything else out there, plus it will hold a heater and have a built in CO2 reactor. That price is also a little high as my local hardware store has greatly inflated prices and a limited selection of plumbing fittings. A trip to HomeDepot or something would probably save 5-10 dollars.

Thanks again. I will post here as to what Pentair says and I'll put up some photos when it is all done.
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Old 10-16-2004, 06:37 PM   #6 (permalink)
 
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Cant wait to see photos!
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Old 10-18-2004, 04:01 AM   #7 (permalink)
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According to Pentair Aquatics:
Quote:
Hi Dennis,
The Quiet One 800 pump can only be used in submersible applications. All
other Quiet One pumps can be used in submersible or dry applications. Hope
this helps. Thank you for choosing Pentair Aquatics.
Best Regards,
Neal Dulaney
I guess i will use the 1200 model. I have email them back to check that restricting the flow to about 150 gph(its rated for 296gph) will not be detrimental to the pump. As always, I will update whenI know more
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Old 10-18-2004, 11:02 AM   #8 (permalink)
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Well, the rated gph is probably without any head pressure so once you get it connected to your cannister and plumbed up to your tank's height it may be considerably less. Also, you could always increase the size of your return pipe/spraybar so that the flow rate is disperesed over a larger area so it doesn't create a lot of current.
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Old 10-18-2004, 06:01 PM   #9 (permalink)
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Thats what I figured. Althought he website has a little chart and at 1' head it puts out about 275gph. I figure thought hat by the time th water comes from the tank, through the CO2 reactor, goes through all the foam and floss, past the heater, negotiates a couple 90` bends, through the pump and out the spray bar I will make it should be ok. I can also use a ball valve to adjust the flow if need be and I am only using 1/2" tubing. I ordered the Pentair Aquatic Quiet One 1200 (296gph) tonight rom Big Al's. I should have it by Friday adn once I finish my DIY I will share some photos.

Thanks for the input Bill
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Old 10-23-2004, 03:10 PM   #10 (permalink)
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Bloody shiping people! My stuff did not come on Friday. Usually it only takes a couple days go get here from Big Al's (email conformation said it shipped tuesday morning) Oh well. maybe monday.

In the mean time, I will have the opportunity to work on my intake and outputs. Does anyone have any suggestions about th econfiguration of the intake and output? I was planning on making an spraybar for the output, drilling holes alon the length of a piece of 1/2" pipe and capping the end. It will run from front to back on one side of the tank, the intake should be on the other side? How many holes and what size? Do they need to be bigger toward at one end to allow for more uniform "spray". I was also planning on having the back holes oriented so they flow almost straight across the back but angling down a bit so that the point almost down in the front, to help keep the foreground cleaner.

For the intake I was going to do basically the same thing but vertically. I can machine in slots rather than holes near the bottom to act as a strainer. Would having some holes near the top help to achieve more even water flow. A hoel near the top might also be insurance for leakes. If the pump of filter sprang a leak, hte suction would break when the water surface reached the hole, about 1" below the normal water's surface. Any ideas about the size of the slots or holes to allow good water flow and suction without robbing it of "power" Remember that the pump is rated for about 275gph where it will be located but will definately be lower than that with all th eresistance from the filter, elbows over the tank rim, CO2 reactor, and there will be a ball valve after the ump for flow control.

Any ideas? Maybe IUknown can chime in about his lilly pipe design
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