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Worm Farm

Worm Farm
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What you will need;
  • Bath: a standard domestic bath (at least 6 foot long)
  • A stand (this can range from blocks of wood to a built stand - see photo examples of my three later)
  • Bucket: 10-20 litre 
  • Shredded paper: couple of big bags (start only)
  • Pebbles: approx 25 litre bag about 20-30mm size)
  • Insect screen: approx 200mm x200mm
  • Broken bricks: half bucket
  • Roof material(sheet of iron, packing case lid...)
  • Carpet: cut to fit bath out line inner.

The picture below is my latest bath worm farm, the rolls royce of worm farms i am calling it, a light tin bath mounted on a welded tube frame(recycled from an old trampoline- guess who finally got a welder)

 
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Step 1Whats a worm Farm

whats a worm Farm
There are three parts to a worm farm,
(Picture 1)

1.) The basement Sewer -yellow- (were the wonderful plant nutrient "worm pee" collects)
2.) The middle floor Bedroom -Dark Green-(who wants to sleep in basement?)
3.) The bottom floor - Basement drains -Lime Green-(we want to collect the worm wee)

The majority of commercially produced worm farms have separate containers for each of these function areas.
This has two distinct advantages in that;
- The basement can be used as a worm pee tank and access via a tap is easy
- House keeping is easy in that you just lift off a box and access the room you wish

The disadvantages of the separate containers includes;
- The size or volume of the farm is constrained by your access to the individual containers (ie you need to be able to lift them)
- The bedding material must be topped up to the bottom of the food container.

In the bath farm, the rooms are are present in layers and thus care must be taken in to ensure the farm is always free draining so the "basement" doesn't flood the "bedrooms!"
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14 comments
Apr 3, 2011. 1:08 AMbennettnz says:
Hey hey!! Have sourced old bath tub for the princely sum of about $30 and am collecting from Orewa next weekend.

Now...... If only I knew someone who lives nearby who could help me set it up............. lol

May 11, 2010. 10:55 AMCapnChkn says:
Hello Folks,

I know this Instructable is 2 years old as of this writing, but I have to point out that old cast iron washware was made with as much as 88% Lead Oxide in the glaze.  There are even examples of people going through the same problems the Romans experienced by soaking foods in these tubs.

As for what our boomer generation has experieced due to these affronts, I can't tell.  However raising worms for their ability to create soil we would then grow food plants in seems at the least, risky.

Google seach, keywords: bathtub, Lead Glaze
Jul 28, 2008. 5:22 PMJIM5349 says:
what do you do for winter, we have freezing temps here, do you just close it down or ???
Mar 23, 2010. 10:35 AMdrawe21 says:
I'm guessing they go deep and dig under the frost line (3 to 5 feet down) around a meter.
Mar 23, 2010. 10:31 AMdrawe21 says:
Most modern news paper ink (Black) is made of Soybeans so it is earth worm friendly.
http://en.wikipedia.org/wiki/Soy_ink
Mar 23, 2010. 2:21 AMmadcow354 says:
Hi I made a worm farm out of my old bath want to know if i can put one catcher of lawn clipping in the farm but I have oxalis in the lawn  is any good or should I dump the clipping can any one help me
Jun 11, 2009. 3:28 PMstarterpistol says:
Tip for collecting the worms: Blend leftover salad to a fine green shake and pour it in one spot on the worm bed, than put a plate over the salad (face down) and wait until dark(10ish ), then look under the plate. The secret is the worms like the dark as opposed to the moon light, where predators lurk, plus it stays moist there longer.
Mar 28, 2009. 3:11 PMprofessorzed says:
I live in Canada, where it gets to freezing temperatures in the winter (in case you hadn't heard).

In this instance I would insulate the outside of the worm farm/ tub by putting some insulation materials around it, such as straw bales for example. You could also put a specially designed soil-warming electrical cord designed for cold frames in the bin to help keep them warm in the winter. A regular 25 watt light bulb will also keep it warm enough for the worms in the winter.

Additionally, adding some fresh Horse manure will help keep them warm all winter. Red wigglers are actually manure worms, so horse manure is their favorite food (which is also bedding). You just have to make sure that the horses haven't been given and de-worming medicine for parasitic worms, since this will also kill your worms. Also, you have to be careful that the manure doesn't contain any Horse urine. The nitric acid in the urine will kill the worms too.

In freezing cold temps, you DO close down the outdoor worm farm in that you no longer feed them scraps until the temps go above freezing. If you open the lid, you will expose the worms to freezing temps and this will instantly kill all of them.

Red Wigglers are natives of warm places like California. They tolerate temperatures between 5 Celsius and 40 Celsius. When the temperature gets cold they huddle into a ball and remain dormant. If it goes below 5c they die.

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