Comment

Comment by Converse on February 13, 2015 at 2:47pm

To bayy. Quest: you might want to be careful about loading your grow beds or filter with worms, simply because worms give off an enzyme in their castings called chitinase. The exoskeleton (Shell) of your crawfish is made up of Chilton. Since AP is a closed system, and worms reproduce well in an AP system, eventually the concentration of chitinase can harm your crawfish. My best to you with your crawfish-aquaponics.

Comment by Leo White Bear on February 12, 2015 at 3:04pm

Just a crayfish tank, you then will need some kind of filter.  As Jeff stated, check out YouTube and the videos on swirl filters.  There are many great videos there for you to choose from to fit your budget

Comment by Bayy Quest on February 12, 2015 at 2:16pm

This just a full time crawfish tank, not hooked up to a grow bed yet

Comment by Leo White Bear on February 12, 2015 at 2:00pm

Michael-

Worms do work.  But, depending on the amount of fish you have and the depth of the GB media, overwhelming the GB with solids can happen.  You Definitely need a filter if you are doing NFT, but this is not the case here I believe.  Talking about using an IBC generally means a media based system.  Nothing is said of a hybrid set up.

  If you over feed your fish or over populate your system the need of a filter is recommended or a bit of research is advised on pounds of fish per gallon of water.

  We don't really know what the circumstances are so I would still recommend a filter system in this case.

Comment by Michael Osman on February 12, 2015 at 11:19am

I know this may be a "newbe" response... I thought we put worms in the grow bed to eliminate the need for a filter...?

Comment by Leo White Bear on February 12, 2015 at 11:04am

Pat-

  I agree with Jeff although Lava rock has the tendance yo be rough on the hands, it is volcanic glass so-to-speak.  With the pea gravel be sure it doesn't contain limestone.  This has a buffering effect on your water and you may be fighting with a high pH down the road and constantly trying to lower the pH which seems to be a loosing battle

Comment by Jeff S on February 12, 2015 at 10:08am

Bayy, there are numerous filter plans on YouTube. Just look for radial flow filter and swirl filters.

Pat, You'll need to consider weight in your equation and if you use lava rock I would get as small as possible, even sorting through and picking out larger pieces. The lighter the material the easier it is to dig around in. I put lava rock on the bottom 1/2 to 3/4 of my bed and expanded clay on top. 

Comment by Bayy Quest on February 12, 2015 at 8:53am

I need to build a filter for my 175 ibc tote. I need plans or ideas for it? I was quoted $200 for a 55 gal drum filter by someone that can build one, but no pump so trying to see what I can do for the same range plus a good pump? Thanks

Comment by Pat James on February 12, 2015 at 8:23am

I priced 2 places in town that sell rock. The cheapest rock at both places is pea gravel...and that is $65 a yard. One place wanted $105 for lava and the other was $175 a yard...

Comment by Pat James on February 1, 2015 at 12:13pm

Thanks Jim.... I can use my stepson's truck so I am going to go get something. I'll take a bottle of vinegar when I go to test, but I will get whatever they are selling the cheapest and lightest.

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