DO YOU HAVE A SIEVE FILTER?

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Not sure we're talking about the same thing. I mean with 100% clean water and a 100% clean screen the water has a hard time getting through the screen. As the holes get smaller there is more material per square inch blocking water. So a water drop might have to bounce more times until it hit an opening.

I assumed you were talking about little bits of crap clogging holes and it having to be hosed off.

correct i misunderstood,
 

crsublette

coyotes call me Charles
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Hmmm, I suppose ...

A fella could have an upright triangle structure where the sieve is 3 layers. 3rd layer at the bottom to be longer since water will take longer to go through a filter with more surface water. 1st is 300 micron; 2nd 200 micron; 3rd 60 micron.

Each layer is angled appropriately so that the debris sluffs off. Don't know, seems like the small stuff could eventually create a daming effect.

Bah, I just need to figure how to DIY a rotary drum filter to filter out the muck automatically. Found a water management website that describes a drum filter. Seems like I would just need a small motor, a couple other things, and bingo ... really don't want to pay the thousands of dollars to a retailer for this.

I thought a sieve filter would do it, it appears not ... unless my triangle pyramid idea thingy works !! :)
 
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I was thinking the layering thing too. Seem logical...maybe too logical. I've gotten into this trap before. Why haven't others tried this? Maybe they have. But it'd be worth a try.

10 years ago a lot of people were messing around with all kinds of DIY drum filters. I've never heard much follow up. I'm reading a thread on Koiphen where the guy installed a manufactured drum filter...he was very excited when he got it...but once installed he didn't say a single word about it. I don't know if that means "of course it works, why would I mention it" or "it didn't work and I'm too embarrassed to say it because of how much I spent".
 
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I know this is an older thread, but fascinating.

It seems to me the cetus sieve is fairly simple in design (as waterbug's diagram illustrates) with the exception of the floating weir. I don't understand why one needs a floating weir. Could you just design a gravity fed sieve without a floating weir BELOW the water line with an air pipe before the sieve to avoid any potential siphoning? This would also work with changing pond depth. I would also add a waste collection area at the end of of the wedge wire like the cetus

It also seems that you could design something for smaller ponds like this that would be highly effective (1500 - 3000 GPH). The cetus sieve is expensive and HUGE. Designed to take lots of water volume, and requiring a 4 foot pit below the water line.

Waterbug and Charles - Don't know if you're still on this forum, but it would be great to hear your thoughts.
 

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