CW's Back Yard Water Garden Begins!


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@combatwombat - we did have to medicate once for a massive die off that we attributed to a parasite, but the Prazipro dosage amounts were relatively forgiving. An educaated guess-timate worked fine. If I were dosing a small closed system (like an aquarium) I'd be a lot more careful about water volume.
 
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Bottom filter is in. This will be an upflow/pressure filter, not a suction filter like many others do. Several reasons for that.

1. Bottom will be sand, which is incompatible with a suction filter.
2. Easier to plumb w/ submersible pump.
3. I get more waterfall w/ an upflow filter!

Started it two weeks ago but was delayed by cold, rain, minor surgery and a house full of sick people. Trunk is 2" PVC. Legs are 1.5" and used single tees instead of doubles because... that's what I could find in the quantity I needed.

Drilled three 5/16" holes every 6" down the trunk and legs and one hole in each end cap. Total holes add up to about 10x the area of the 2" trunk so if I ever do want to reverse it to a suction filter, I can do so w/o having issues w/ the pump.

Couldn't find a 2" cap (supply chain, amiright?) so I stuck a clean out on the end instead. Will probably never have a use for it, but doesn't hurt!

Pipes will push water through 6" of sand. Don't know the exact SSA, but I bet there's more in 6" of sand than 2' of gravel. Between this and the bog, will have about 35% of pond surface area doing upflow filtration.

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Rain or not you have been busy. Are you aware not all sand is created equal ? Some sand will never settle when stored up while other sand compacts so dense. I believe your looking for course sand. But I am not positive

I also question how much head pressure this is going to add.

So instead of return jets you went with a upflow at the bottom of the pond?

Where is the upflow water coming from ? Is it being filtered before its pumped to the sand ?
 
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Long time coming looking forward to see a fish in the pond. But I'm betting it will be Cw in the pond first.
 
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Nice! Maybe turn a bit more down to avoid perimetral wall and take in the part of pond closest home. (if possible ofc)

Damn i want see it finished and full ahhhhhh :eek:
 
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Great work, in the near future I hope to start a project although smaller than yours, over 2700 gallons. One question, how are you going to make the water inlet from the pond to the bog diffuser? Although it may not have any importance when having the milk boxes, because you have a pool of water that will press up regardless of where the water enters. I've also been thinking about backwashing, they say it takes a lot of water power pressing up. It could be an option to leave a tube inserted at different depths of gravel, for example three tubes with their plug (hidden with stones) so we could plug in the hose and it would not take as much water force as only to do it from above.
 

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Great work, in the near future I hope to start a project although smaller than yours, over 2700 gallons. One question, how are you going to make the water inlet from the pond to the bog diffuser? Although it may not have any importance when having the milk boxes, because you have a pool of water that will press up regardless of where the water enters. I've also been thinking about backwashing, they say it takes a lot of water power pressing up. It could be an option to leave a tube inserted at different depths of gravel, for example three tubes with their plug (hidden with stones) so we could plug in the hose and it would not take as much water force as only to do it from above.
the way you backwash a bog is to use the POND PUMP (assuming a large enough one here) to push water DOWN through the bog stone and the debris are forced to the lower depths (breaking loose any planar debris on the bottom of the pea gravel layer) and then into a centipede structure (this can be any plumbing such as your manifold that ends in another unit called a snorkel, which is where you'd then put a SECONDARY pump to pump out the dirty water). The manifold should pitch toward the centipede, which WILL be the lowest point of your bog. Depending on force from the pond pump, it should take 2-3 backflushes/aux pump pumpouts before you get clean water.

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Back flushing a bog is primarily futile . While it will get what accumulates across the snorkel to a degree and as the water may drop and some sediments will fall out of the stone. ANYONEwho has ever tried to wash their gravel before they put it into the bog will tell you the amount of water needed while a lot is not the problem . The problem is exactly why the bog works so well it can hold and trap huge amounts of sediment and throwing all the water you want at it the majority will never wash up of a thick mass of stones. Now it you make the thickness only 2 inches the water can effectively flush out these sediments. Make it a foot thick and it becomes impossibly
 

brokensword

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Back flushing a bog is primarily futile . While it will get what accumulates across the snorkel to a degree and as the water may drop and some sediments will fall out of the stone. ANYONEwho has ever tried to wash their gravel before they put it into the bog will tell you the amount of water needed while a lot is not the problem . The problem is exactly why the bog works so well it can hold and trap huge amounts of sediment and throwing all the water you want at it the majority will never wash up of a thick mass of stones. Now it you make the thickness only 2 inches the water can effectively flush out these sediments. Make it a foot thick and it becomes impossibly
I think it's feasible, GB; I've tried using a hose from the house (and that was the problem, to which your post is relevant) and DID clear some out but it did seem like a lot of work for little gain. This method was from a pond professional and I actually talked to him (AFTER the fact, unfortunately) via phone and the idea is you NEED the force from the pond pump (again, it has to be substantial; nothing rated for less than 2k gph is going to do much, imo) AND the bog sides should be shaped into a V so all debris carried down goes to the lowest point.

I do hear you in that it isn't optimised but he'd been doing this for decades (building ponds; bog? not sure but he had web pages and lots of pics, so seemed to know what he was doing--not going to stay in business that long doing sub-optimal work). It was HIS experience tht 2-3 flushes/pump outs will see clear water.

And remember, if not pumping from the bottom of pond to bog, there should only be free-floating debris which should decay and won't 'clog' like sand grit associated with a pea gravel delivery.

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I won't deny you can get some material to flush but go look at my build I used 12000 gph pump coming out of a 3 inch hose . And no matter how long how much I stared and moved the rock around more and more sediment came out. Cw found out as well that without putting the stone into a sifter/screen the stone piled is why we use a bog they grab on and hold on. I dumped so much water and I did little to clean it
 
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Weather turned awful, got busy with work, other little projects & holidays. But managed to load some flagstone up in the Focus to cap the top of the in-pond block wall. Holy hell that stuff is expensive.

how are you going to make the water inlet from the pond to the bog diffuser?
It's already made! 3" PVC goes to the very bottom and goes into the 12" centipede unit. That's pretty much it! :)
 
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That's a pretty big line feeding a bog . I imagine your throwing a ball valve to limit the amount of water your going to push through it . What are you leaning toward as a gph
 
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That's a pretty big line feeding a bog . I imagine your throwing a ball valve to limit the amount of water your going to push through it . What are you leaning toward as a gph

There's 75' of pipe + a few sweep elbows and I am planning to use a low-head pump for more energy efficiency, so 3" line was necessary to achieve that. Thinking I'll throw about 2,500-3,000 gph to the bottom and send everything else over the top.
 
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What's the total gph I estimate my falls atabot 6000 gph maybe more and the rest goes to circulation in the pond. I should note that there's two bogs that I feed splitting the 6000.
How many watts is the pump you bought and by whom.
 

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