Pond Filter

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Pugle,

Overall, you can tell it is the same design in principles. A few modifications and tweaks here and there to adjust for "the stuff we have" is just the nature of DIY, don't you agree?

When I saw Mr1SUPERBs videos on this sieve filter design, I immediately wanted to put one together. I thought that it was an exceptional design. However, I also like to "tinker".
It was my desire to accomplish several filtration tasks in one 55 gallon barrel. So, I dreamed up some modifications of my own.

I wanted to try a cone-shaped "umbrella" for the SS mesh strainer portion and have the solids roll off the bottom of the cone into ten filter socks set in a circular pattern around the
inside perimeter of a 55 gallon barrel. I was going to have the influent water come up through the center of the cone like a (gentle) volcano and spill out over the whole outer surface
of the SS mesh cone. I bought 300 micron SS mesh for the cone (instead of the 100 micron that Mr1 stated). It was less expensive and I thought that it would clog less. Especially
if any algae or bacteria colonies happened to attach themselves to it.

I did some very crude testing of the SS mesh in my kitchen lab and discovered something that I didn't like very well about this design. Because of the capillary action of the mesh and the adhesive/cohesive quality and surface tension of water, the water seemed to want to follow or hug the inside of the mesh down its length rather than dropping or flowing straight
through the mesh.

I wanted it to waterfall straight down through the mesh cone into the open center of the barrel moreso and leave just a minor flow over the outside of the cone for washing the solids into the filter socks. My tests didn't seem to provide me with sufficient evidence that it would operate this way with the limited space and angles allowed. My impression was that I either needed a much larger cone with longer sides (which I didn't have space for). Or, I was going to have to forcefully direct the water at the sides of the cone to push it through the SS mesh (which I thought would cause some smaller debris to be packed into the mesh and become trapped, build up and eventually clog).

The inverted SS cone sieve design looks really interesting and hopeful on paper, but if it doesn't work it isn't worth the time and expense to fabricate a prototype to prove that. I am fairly assured that, because of the geometry and the size that I desire, it won't work. It would work for a much larger vessel, but then I am defeating my original goals and just changing my design anyway, so I might as well go a different route right off the bat.

But, I am still pondering something a little different here. It keeps me trying, you understand. It is what makes this part of the DIY thing "FUN" for me.

Gordy
 
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Gordy,

I wholeheartedly agree with you about diversity and ingenuity being the fun part of DIY.

What I've found using the single layer of sheer curtain material between the window screens is that because the sheer material is so fine, a lot of the water does pass through it, while stopping the solid waste from passing through. The window screen I''m using traps the sheer curtain material between, and yet I find that not much of the waste sticks to the window screen material, but rather "washes down" it. So, although some waste does escape into the bioballs below, and back into the pond via the main outlet, I'm giving this screen a moderate 50% to 75% capture rate in my best estimate. I'm happy with that.

On a more gruesome note.... I don't know how it happened, but one of my poor toads ended up being ingested into my pump (poor little guy). The pump chewed him up pretty badly "a la garburator", but there he was caught in my filter sock along with loose algae and waste fish food!

Now back to your idea of a cone. You described it well enough that I can totally picture it in my mind's eye. How about this ... figure out a way to make this cone / umbrella out of some kind of frame. Around this frame you could wrap a sandwich of 2 layers of nylon window screen material with a layer of that sheer curtain fabric between the two screen layers. Again, I find that quite a bit of water passes though the sheer yet enough water washes down the screen / mesh to give a great flow to the solids trough, so you wouldn't get that capillary action that you do with the 300 mesh SS screen.

I actually like your idea better than the design that Mr1 posted on youtube based on my perception of your idea. Everything inside the drum, and you wouldn't need an external bucket like mine. I take it your design would have a circular table inside the drum housing the filter socks. Just try a quick test with a couple pieces of window screen and some sheer curtain material .... inexpensive, and based on what I'm seeing with my set-up ... you'll get a good capture rate and the desired "flow-through.

Let me know :)

Paul
 
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Paul,

Sometimes fish and tadpoles or adult frogs/toads find their way into the WRONG places in a pond. Sad to hear about your gruesome toad SMOOTHIE (a little tasteless humor there, sorry).

QUOTE: "I actually like your idea better than the design that Mr1 posted on youtube based on my perception of your idea. Everything inside the drum, and you wouldn't need an external bucket like mine. I take it your design would have a circular table inside the drum housing the filter socks. Just try a quick test with a couple pieces of window screen and some sheer curtain material .... inexpensive, and based on what I'm seeing with my set-up ... you'll get a good capture rate and the desired "flow-through."

1] Thank you. :) Like I said, it sounds good in principle, if I can just make it work.

2] You are correct regarding the circular table (shelf) for the sock filters. I have already constructed this piece out of 1/2" thick white polyethylene plastic.
I used a hole saw and cut ten holes for the filters to set down in and then used a rabbet router bit to recess the perimeter of each hole so that the flanges of the sock filters lie flush.
Looks kinda like a big donut with a lot of extra donut holes! When the filter socks are installed, it looks like a holstein cow with a circular udder! Hee!

3] Thanks for the great idea for a prototype! Much easier to implement for a trial run than cutting up and perhaps wasting the SS mesh, being expensive as it is.

Gordy
 
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Hi Gordy,

Did you try the window screen / sheer curtain material to see if it works for your set up? Just curious..... and you're right. Way cheaper than to use the SS mesh. See if that works for you, then maybe go to the SS for the final product.
 
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Pugle1 the blue filter medium you have in your filter, we found that afte a time it becomes brittle ad the ends start coming off , it may be an idea to replace them with some other media its fgot a habbit of clogging pumps as we found out.
What doesnt cug the pumps goes through into the pond ( I've always been petrified that one of my koi would swallow one of these bits so I got rid of them using K1 Aqua one bio balls and another make of bio ball that I cant for the life of me remember what it's called .

rgrds

Dave
 
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pugle1 said:
Hi Gordy,

Did you try the window screen / sheer curtain material to see if it works for your set up? Just curious..... and you're right. Way cheaper than to use the SS mesh. See if that works for you, then maybe go to the SS for the final product.

Hi Pugle,

Nawh, I haven't had the time to work on my projects lately. Too many other irons in the fire right now so it will have to wait until I get some slack time.

Gordy
 
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Dave 54 said:
Pugle1 the blue filter medium you have in your filter, we found that afte a time it becomes brittle ad the ends start coming off , it may be an idea to replace them with some other media its fgot a habbit of clogging pumps as we found out.
What doesnt cug the pumps goes through into the pond ( I've always been petrified that one of my koi would swallow one of these bits so I got rid of them using K1 Aqua one bio balls and another make of bio ball that I cant for the life of me remember what it's called .

rgrds

Dave
Hi Dave,

I'll keep an eye on them, but so far so good .... they're out of the sun and inside my "dark" filter barrel. But thanks for the heads-up... something to watch for to be sure. I bought them as the other brands that I was looking at were 3 times the price, yet the ones that I have said that one cubic foot offered 270 (or was it 370?) square feet of growing area... I have 5 cubic feet of them. I just put them in this spring, so I'll keep an eye on them and especially at the end of the summer so see how they're doing. My experience with this type of plastic is that it breaks down under constant UV light, and again mine are in darkness, but I will pay attention to how they do. Thanks again :)

Cheers!
 
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Catfishnut said:
Hi Pugle,

Nawh, I haven't had the time to work on my projects lately. Too many other irons in the fire right now so it will have to wait until I get some slack time.

Gordy
No probs... was just wondering if you gave that a shot or not. If you do try it, I'd be very curious to see the results.

All the best, and talk soon :)

Paul
 

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