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 Post subject: Re: Crayfish system
PostPosted: Jan 21st, '17, 08:42 
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cant comment on the species you have access to but the yabbies, marron etc work well at eating left over food.
Re: hoarding - you shouldn't have that much food left over. Yabbies are technically aggressive and will lift and wave their their claws but reality is that when they have lots of hides (PVC etc) they don't really worry about the fish too much.

most crayfish generally don't catch and eat live fish (they are more predated by fish) - they tend to feed on rotting material, veg and dead things and each others babies. But if the opportunity arises and they can hold on - then maybe....

In an 1000L IBC with many species you would be lucky to have more than 2 dominant ones survive unless you have a lot of landscaping.

I guess catfish or plecos/suckerfish are the other option for cleaning up bottom food.

@GoldyGlocks - I suspect it is more about floor area than total water volume. Total water volume would only apply if the crayfish occupied the full vertical profile. An IBC has quite a small base for example compared to a 1000L circular aquaculture tank. Many tubs like the rubbermaid ones tend to have small bases.

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 Post subject: Re: Crayfish system
PostPosted: Jan 22nd, '17, 00:10 
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@Darren-Yes, I'm aware of that, which is why I made the comment "Obviously that's gallon wise but they prefer the bottom and won't be swimming all that much so you'd probably be even lower than that and only be able to raise around 10-20 if you're lucky." Sorry for the confusion. With hides I'd say you could get away with a few crayfish. Not sure how effective they are at cleaning the tanks so I'd agree with catfish as another option. Don't know much about raising anything to clean the tank though.

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 Post subject: Re: Crayfish system
PostPosted: Apr 17th, '17, 21:06 
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Hi, I've been thinking g about doing an aquaponics system for a few months now and I want to use crawfish in it. I'm located in Kentucky and was going to put it in my garage. I was wondering what I should do in the winter about keeping them alive? I want to start out small and cheap, but still raise more than a few so what size tank do I need? Any tips?


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