Raising crayfish in Aquaponics

     My experience with using crawfish (or cray fish depending where your from) has mixed feelings.
Now I dont for some reason have any pictures of my set up but let me explain my pros and cons about raising Crawfish.

I was doing an experimental set up with a flood and drain system with a small deep well attached.

 not wanting to use any fish because of the cooler temps in NW Arkansas that time of year I decided on local creek cawfish. First lets just note that when catching these quick lil buggers it would help if you had a net. But caught about 20 small to medium crawfish and also a few tadpoles (different story) and one of those bottom sucker fish, and also 3 snails.
  
    I placed all in a small styrofoam cooler without a lid and placed them in the back seat of the truck. That was mistake number one, when I got home, half of the crawfish had escaped and were all over the truck. Took about an hour to find them.

   My patio is inclosed with a pool dug into the ground. I built everything the same level an currently pouring concrete around the pool.  Everything is closed in.

    Now to the point. Once placing the crawfish in the aquaponics. I built a wire box from old chicken wire so that they can climb on and also cut some pvc to place on the bottom for privacy.

   The next day, I discovered 2 crawfish in my pool, now remeber it is cool out, so off I go with snorkle gear and catch the 2 and place them back in the 75 gallon tank.
I thought well that was odd couldnt really see how they could climb out.
Next day same thing, but 4 this time. back with the snorkel gear to chase the crawfish down.

    So I watched them for a while noticed that when the water drains from the grow bed and the water table rises that its only 3 inches from the top, so I took out a few gallons until it was 6 inches thinking maybe that would do.

   Next morning nothing was in the pool, I was happy, until the next morning, 3 more were in the pool and was on its way. starting to almost enjoy the cold water swim now, but not quite.

    I realized then that they were climbing up the folded part of the liner. after a month of all this and modifications I gave up and brought them back to the creek, it was time to use my pool and didnt need them in it.

    But to the good part of it all. The natural habitat worked very well. I even dipped up duck weed from a local pond. The water stayed clear and I fed the crawfish fish pellets and they really loved the sweet feed that I still had from when I had a pig. I enjoyed having them and watching the lil habitat work. The plants seem to well too, the basil grew tall and had some cabbage taking off.
I think I would like to do this again but with a tank that has slick sides.
   The nutriets from the habitat looked to be balanced even though I never took any test.

So if you see a few crawfish in the creek and have a container that will hold them, do grab some, very beneficial, But if you have a pool close by and they can escape, well its best to just leave them where they are, lol

Oh! and about the tad poles, well they do grow! and it is so awesome to watch them get their legs and

see them change their heads and then next you see them sitting on the side of the tank and jumping, and then..... well then you see them under your lawn furniture are taking a dip in your pool. So maybe not the best idea, but it was fun.

If you have had any experience of raising craw-fish in aquaponics, please leave a comment, I would like to know how to do it without sharing my swimming pool.

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Step by step how I did my Aquaponics

   So I have been reading articles and watching videos, and I just couldnt take it anymore. I had to build my own Aquaponics! As for everyone, money is tight so I built it about as cheap as I could and I can upgrade as I go. I will Be building a C.H.O.P. System (Constant Height, One Pump)

First I had an old falling down building that I took apart and used what wood I could salvage to build a table. I built it 3 feet deep and 4 feet wide by 3 feet tall. I built it that tall because I wanted to be able to have easy access to the fish, and I measured the 100 gallon stock tank that I want in the future and it was 2 feet.

At Lowes I purchased a plastic mixing tray that is used for mixing concrete and mortar. They have two sizes. Small for $7 and the large for $14.00 I went with the large and I will need another one in the near future.

Then I stopped by one of the box stores and found a deep 30 gallon tote for my fish, and since it wasnt very big, and I wanted constant water level in my fish tank, I also bought a small tote for what I call a nutrients tank.  The large tote cost me $7 and the small one cost $4. I think you could could get away with just one large tote, but I felt it was safer to not pump water out of my fish tank just in case something happened and it wouldnt just continue to pump all the water out to leave my fish with some serious breathing problems.

So here we go, this what I did.

First I drilled a 1 inch hole near one end of the mixing tray.


I then wrap Teflon tape around the male end of a 3/4 slip coupling. then I place a rubber bushing over that. You can get a pack of bushings and washers from any hardware store. Its like $2.  I place the threaded end from the bottom through the hole in the tray. Then I put another rubber bushing on the threads and screw on the female slip coupling.


 I use teflon tape because I tried to just screw the couplings together and the friction just locked them together and I couldnt screw them together all the way, and I couldnt even get them apart.
So now you have the tray with a slip coupling on the bottom and the top of the tray.

Next I measure over to the hole on the bottom of the tray taking in account of the slight slope from the top and applying that measurement to my table. I use a 1 & 3/8" paddle bit to cut the hole so that I have plenty of clearance for the 3/4 pvc.

Here I  place about a 4 inch piece of 3/4 pvc pipe in the coupling on the bottom and then place the tray over the hole. That leaves me with a couple inches of pipe sticking out under my table.

Then I place a elbow on the bottom of that pipe. then a 3 inch piece of pipe and then another elbow which now will have a 12 inch pipe placed into that pipe facing down towards the floor.

Now the stem for the siphon. I use a 6 inch pipe and then I slip that into a 1 inch to 3/4 reducer coupling. then the whole stem is placed in the coupling that is in the bottom of the tray.

For the bell for the siphon (the piece that goes over the siphon stem) I choose to use a 2 inch pipe and cap. At the bottom, I drill several holes to about 1and a half inches up the bottom. This will allow water into the siphon stem, but as the water drops it will automatically stop the siphon once it reaches these holes.

Then the siphon guard as I call it will be a 4 inch in diameter pvc pipe cut the same as the bell siphon which in this case will be about 9 inches. I then drill half inch holes through out the bottom half of the pipe to allow the water to pass through but to not let our medium to get in the way of our siphon maintenance.

The fish tanks is next. I come down about 3 to 4 inches and drill 2 holes that are 1 inch.
This allows the water level to stay close to that level. You can use bigger pipe if you like but I just wanted to use the same pipe that I already had. I then use a 3/4 inch thread on one end and a half inch nipple on the other end. I place a rubber bushing around the 3/4 end, stick it through the wall of the tote and then another rubber bushing and then a 3/4 female threaded coupling with a slip end on the other side. Once you thread the couplings together the rubber bushings should not allow water to leak, but you may have to use a wrench to slightly tight them more. Then the slip a five inch long hose onto the nipple. Do all this for both holes in the fish tank

Now I take my smaller tote and mark where the holes should be so that the hoses line up and drill 1 inch holes into that tote. Now I slip the hoses through the small tote and that will allow the water as it rises in the fish tank to over flow into the nutrients tank.

I do want to make a small note. If I was to do it over again, I would just lift the fish tote a little higher off the ground and change out the hoses to just regular pvc that lets the water fall into the nutrients tank. This would save on having different fittings and hoses.

Now I cut a 3 inch pipe to place inside coupling in the fish tank, and add a elbow to that, then I add a 12 inch piece of pipe followed by a 45 degree elbow that should now be resting on the bottom. This will work as a suction as the water level comes up and it overflows to the nutrients tank it sucks the trash off the bottom, now keeping the fish tank clean. Which I think is pretty cool. Anything to keep the maintenance down. Do this for both holes in the fish tank.

The pump I use is just a simple submersible fountain pump that you can find at Harbor Freight or Big garden centers. The one I found was actually from lowes that was on clearance when the season started to get cold. I use a half inch hose to connect the pump to a half inch pvc that then goes to my bedding trays. You can skip that step and just run the length of hose strait to the bedding tray if you like. But since I plan on putting valves to control the flow later, I chose PVC.

I am using Lava rock for the first base and then will add expanded clay to the last 3 inches of my bedding trays. I could have went to the creek and got some  creek pebbles, but It was just easier to go to the garden center.

The system was then filled with water and ran for a couple days to make sure the chlorine was out and it was going to work ok before I placed the fish. For testing purposes and it was also going into winter I decided to go with local fish to start and then change them out to Tilapia come spring. You can read how to properly cycle your fish here on the blog if you are wanting to do it correctly.

The fish I chose were simple perch, and one crappie just happened to get caught so its in the tank too.

I feed them worms and crickets twice a day, they are very active.

This will I think pacify me for now until I can build bigger. I have so many plans for the system I sometimes lose sleep.  Buts thats what makes it nice. There is no wrong way to do it, just a better and more efficient way in doing it.

Please like share and subscribe to my blog and You-Tube Channel.

Any Question on what I did, feel free to ask.


I will add a video and some more pics soon.

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Aquaponics In a recycled Ice cooler

Here is just something I decided I had to do when the compressor shut down and was told that it was going to cost $300 to fix it!

 

After the snow and -2 degrees

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How to adjust pH in aquaponics systems

Here is a great video on how to adjust your aquaponic system naturally. I have been scared of the ph, this makes it easy to understand and can be done naturally without chemicals.

Please watch this video and go over to Grow Dinner Aquaponics channel and subscribe to his channel.

 

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