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    Thread: how to make a homemade settling tank

    1. #1
      znorton_505 is offline Senior Member
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      how to make a homemade settling tank

      in regards to my previous forum on how to make a new pond: i need to run liner from 2 4" bottom drains to a settling tank. can anyone help me out of how i can make a homemade settling tank so i dont have to spend thousands of dollars? diagrams would be great. thanks for everyones help, i hope i can get this all right

    2. #2
      BickalDIYPond Guest - Time to Register
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      do you have one of my CD's yet ? Lots of DIY settling chambers on there made out of rubber. Also if you look on this board, you will find a thread on my filter construction, and pictures of settling tank are there also. :D

    3. #3
      znorton_505 is offline Senior Member
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      i need that cd. how can i get it and for how much? i can pay through check or preferrably paypal. thanks

    4. #4
      BickalDIYPond Guest - Time to Register
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      only $10 at www.bickal.com, and paypal is the best. Thanks dude !!

    5. #5
      znorton_505 is offline Senior Member
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      i juts paid you through paypal. it should have the shipping information on there. thanks a lot it looks like it has a lot of info i can use. i appreciate it.

    6. #6
      seanmckinney's Avatar
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      I made one from concrete paving stones and a homemade box, shaped, liner. It is obviously only small and as it turns out just about 15 minutes pump rate size. I did a trial run a while ago and had to alter the plumbing which was restrictive but the weather has been wet since then and the water table's too high to fit the liner to the adjusted plumbing.

      http://mysite.wanadoo-members.co.uk/...7-picture1.jpg
      http://mysite.wanadoo-members.co.uk/...7-picture2.jpg
      http://mysite.wanadoo-members.co.uk/...7-picture3.jpg
      http://mysite.wanadoo-members.co.uk/...-picture1.jpg?

      For a bigger tank concrete block would do the same job and you can make the tank round with a coned bottom etc, I just wanted a simple tank that I will vac clean as required as the pond is probable less than 1000 gallon

    7. #7
      Ryan S.'s Avatar
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      Settling areas should be round with cone bottoms ideal function, that leaves you several options. One is the vortex tanks made specifically for this reason, they are usually ~$200-700 depending on the size, you need one for each 4" drain. Another option is water holding tank you can usually find at farm stores (cut bottom off, and install them upside down to give you the cone), advanage here is cost, as you can get large sizes good for high flow rates, even the 1500gal ones are still under $500. Another option is forming and pouring one from concrete. Another option is making one out of liner, you do the sides with some type of round structure like a wood form or concrete blocks arranged circular, cone is shaped out of the soil. I did the last trying to be cheap, I aready had the blocks and liner, but you should be able to obtain them cheaply, put a drain in the bottom from a 4" toilet flange.

    8. #8
      znorton_505 is offline Senior Member
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      thanks hardtop and for everyone elses advice, but does anyone have pictures of these deas. i like hardtops last thought but would love to see it visually as all of this at once is confusing me a little bit. thanks

    9. #9
      dcny is offline Senior Member
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      Upside-down tank

      Kent has a picture of a well tank turned upside-down. He's using as a Qtank for one of the ponds he built. It's on the third page of "The Bridge" thread.

      http://www.koiphen.com/forums/showthread.php?t=3770

      -Dan

    10. #10
      Ryan S.'s Avatar
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      Quote Originally Posted by znorton_505
      thanks hardtop and for everyone elses advice, but does anyone have pictures of these deas. i like hardtops last thought but would love to see it visually as all of this at once is confusing me a little bit. thanks
      On the "farm" water holding tank, the post above gave a link to one installed. You put a bulkhead or DIY one with a toillet bowl flange, probably 3" or 4" (4" would be better) in the center of the cone to flush it with. That one area you see in the pic needs to be filled in with concrete after installed so the cone will be flush, you can leave this concrete or paint with drylock (a pint is ~$7 at lowes). Cut off the bottom for access to it, since the tank will be mounted upside down.



      On the block idea, just install the concrete blocks in a cicular pattern and dig a cone out. Not perfectly round, but much better than square. You can back fill the blocks will dirt if you think its needed. If I didn't already have the blocks and liner, I would have gone with the farm tank, a better result IMHO.

    11. #11
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      C5, where's te best place to find those?

      I will check with local Southern States, but just wondered if you had any other suggestions in NC?

    12. #12
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      Luke-GR

      The local Tractor-Supply Store or Farm Co-op should have it.

      Kathy in SC
      Lifetime charter Member #3

    13. #13
      Ryan S.'s Avatar
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      Quote Originally Posted by luke-gr
      I will check with local Southern States, but just wondered if you had any other suggestions in NC?
      You need to look very close to local to you on the larger sizes if you need them delievered to you. Depends on the size, some are made to fit inside a standard truck bed (~200-600gallons). Check any local farm stores. Where I live we have some locals, the national chain Tractor Supply, and regionals Southern States and Agri-supply. Agri-supply is usually the cheapest here (they have 2" bulkheads for $3 also) but I doubt there will be much a difference in price from whatever local source you have.

    14. #14
      Bert's Avatar
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      Settling Tanks and GPH

      Is there a chart or calculation that would give the max GPH
      for different size vortex settling tanks. How do you know what
      the GPH limit is on each size. Sure would be a big help.

      Bert
      Koi Dummy

    15. #15
      luke-gr's Avatar
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      Bert, Im bumping for you... I asked a similar question a little back. Responses I got said vortex cant be too big, but I wonder if 500 gph would create a spin in a 60" vortex...?? I guess it would. There was a recent discussion on this forum about the coriolis effect and the slight forces that it takes to make water spin.
      Luke

    16. #16
      Ryan S.'s Avatar
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      10% of the gph would be a general guideline, more is usually better. So for a 3600gph pump that should flow 3000gph in a given system, the settlement area for that pump would be at least 300gal in a vortex setup (more for square settlement). Even in this case, sizes up to 600gal in example would be preferable to many ponders.

    17. #17
      dcny is offline Senior Member
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      dwell time

      I don't know if this is true for vortexes, but I thought the rule of thumb for settlement tanks was to have a 5 minute dwell time. So for example if you were pumping at 6000gph then you would need a 500 gallon settlement tank.

      -Dan

    18. #18
      Bert's Avatar
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      Making Your Tank

      Man...it's almost like you have to have a small pond (settling tank)
      to have the big pond. A 5 minute delay makes for a biggg tank at
      high rates.
      On building a tank.....A bunch of years ago I needed a tank for some
      other type of fish I raise. I was telling a friend of mine about it.
      He owns a boat company and came up with a cheap and easy way
      to make great tanks.
      I needed a tank 4'X6' by 36" deep. He bought some of this 1" ridged
      foam board. Cut it to the size needed to make the tank and nailed it
      together. He then took his chopper gun. That's a gun used in fiberglass
      shops. It shoots resin and small lengths of string fiberglass out of the
      nozzle. It actually feed the strings of fiberglass off a spool and chops
      it at the nozzle where it mixes with the resin. Hense--chopper gun.
      They spray it on then roll it flat. Makes a great water tight tank. He
      sprayed both inside and outside. Its great. Very sturdy!
      So if you have a local fiberglass shop with a chopper gun, almost all do,
      then you can build exactly what you want for pennies on the dollar.
      Don't know why I didn't think of it before since I see mine several times
      a day.
      Bert
      Koi Dummy

    19. #19
      luke-gr's Avatar
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      Didnt I just read somewhere here that the Wave 36 Vortex is only 185 gallons?

    20. #20
      Kent Wallace's Avatar
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      Luke

      Yes but because of it's height it works better. Remember that all the rules and guidlines established are on someone elses less efficient system and as technology gets better the rules change.

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