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 Post subject: Re: Murray cod madness??
PostPosted: Sep 30th, '16, 15:45 
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Nothing wrong with silvers... I smoked and ate two of mine a couple of weeks ago - better than any smoked fish from the supermarket I reckon! And they managed to survive all the bad treatment I gave them in the early months.

Just about to make a relevant post on my other thread.

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 Post subject: Re: Murray cod madness??
PostPosted: Oct 24th, '16, 18:27 
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nearly four weeks since last post... no more deaths.

There are still one or two MC that don't look like they've grown much. But the rest of them are getting bigger. I'm pretty sure that fixing the pH has made the difference. The pellets are gone in half an hour of late and I'm feeding the same quantity 3 times a day instead of one or sometimes two.

They were on 4 mm pellets but now a mix of 4 mm and 6 mm.

And they don't all fit under the pump any more... so I can get a good look at parts of them even during the day. But Mel hit the nail on the head when she suggested they lurk, because they don't do much during the day.

Following is shot with night vision on a security camera when they come out to play... just to prove they're a little bit bigger.
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 Post subject: Re: Murray cod madness??
PostPosted: Oct 24th, '16, 19:21 
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If they're lurking fish maybe try giving them a bit more space to lurk under? I've seen 1 foot sections of large diameter pipe, floating mats, small metal shelving units. Not quite to the level of aquarium, but enough to maybe get them a bit more comfortable?


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 Post subject: Re: Murray cod madness??
PostPosted: Oct 24th, '16, 19:37 
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Thanks Frap... but, as I understand it, a bit of crowding together (and no hiding places) is a good thing for MC. Apparently it helps overcome their territorial and aggressive nature... so they're less likely to eat each other. I'm running my fish tank only half full at present for that reason.

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 Post subject: Re: Murray cod madness??
PostPosted: Oct 24th, '16, 21:15 
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Thanks for the tip!


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 Post subject: Re: Murray cod madness??
PostPosted: Jan 15th, '17, 09:59 
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Long overdue for an update...

Have had no more deaths. The MC are still shy, only taking the floating pellets when the cover is back on - so I'm going to give Scotty's advice about converting a floating pellet to a sinking one (soak and squeeze) another go.

Will be away from home for an extended period so I'll move the MC to my main, outdoor system. Friends and neighbours will only have to keep an eye on one system.

I moved two yesterday as a test prior to moving the remaining 16. They look happy enough in their new home... still trying to lurk in the dark corners but the constantly circulating larger silver perch tend to bulldoze them out of the way - though it doesn't seem to be an aggressive thing.

Both fish looked very healthy and were of similar size - 20 cm and about 130 grams. They were 10 - 12 cm when they arrived 6 months ago. I've been feeling disappointed in how much they eat and their apparent slow growth rate. It's definitely not up there with trout or barra... or maybe jade perch. But I've just looked at my growth rates for silver perch and it compares very favourably.

With luck, their new tank mates will get them excited and hungry with all their splashing around at feeding time.

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 Post subject: Re: Murray cod madness??
PostPosted: Jan 15th, '17, 14:18 
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Updating the update... too late to edit what's above.

Just moved the remaining MC. All looked healthy. A couple of them were very small... not much bigger than when they went in. The rest were about the same as the one I measured yesterday - except for the one who came in at 25 cm (I'm guessing 200 grams). He or she might explain why I expected to be moving 16 but only counted 12 :think:

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 Post subject: Re: Murray cod madness??
PostPosted: Jan 15th, '17, 14:25 
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Erk! Well, you have at least one fish that's feeding well, but it's a shame he/she is feeding that way... :P

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 Post subject: Re: Murray cod madness??
PostPosted: May 15th, '17, 09:02 
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Still haven't given up. Though I've lost another 2 or 3 in the last 4 months.

Most of them haven't grown much. But the biggest one looks like it might be about 30 or 35 cm by now.

I plan to have Murray cod for dinner in September when the water in my main system heats up enough to add some jade perch fingerlings that will overwinter in my smaller heated and insulated system. I'll eat them before they eat my jade perch.

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 Post subject: Re: Murray cod madness??
PostPosted: Jul 3rd, '17, 14:31 
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Here's a picture of my biggest Murray cod. Taken when I harvested two of my silver perch. It was a good opportunity to do a head count in my system.

There are 6 survivors. The biggest is the one in the photo. Looks pretty healthy to me. 33 cm and I'm guessing a bit under 400 grams - it's hard to tell but definitely not as heavy for its length as a silver or jade perch.

The other MC are all around the 25 - 28 cm mark... too big to be eaten which wasn't the case for some of their smaller mates.

They're eating well... despite the maximum water temperature being around 13 C over recent weeks. Silver perch have gone off the pellets but the MC are still enthusiastic.


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 Post subject: Re: Murray cod madness??
PostPosted: Sep 27th, '17, 18:03 
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I'm not sure I'll go with MC again... they're a lovely fish to look at and watch feeding. But I lost a lot early on. Have only managed to raise 7 (out of an initial 20) to plate size - over about 15 months.

That said, I'm looking forward to dinner in a few minutes because it will be my first harvested MC - with salad from the growbeds. It was 33 cm and 530 grams... a striking looking and healthy fish as I see it! Though I might be lacking a bit of perspective :dontknow: There was one bigger one but I couldn't net it.

Here it is just before going in the oven... and the growbeds it powered.

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 Post subject: Re: Murray cod madness??
PostPosted: Sep 27th, '17, 19:58 
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Nice! Fish and plants all look awesome. :thumbleft:

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 Post subject: Re: Murray cod madness??
PostPosted: Sep 27th, '17, 22:33 
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Gorgeous AP thanks for sharing

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 Post subject: Re: Murray cod madness??
PostPosted: Sep 28th, '17, 06:57 
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Thanks for the kind words Mel and Boss.

Here's what it looked like just before we ate it. Ginger, lemon, garlic and butter... delicious!
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 Post subject: Re: Murray cod madness??
PostPosted: Nov 19th, '17, 10:38 
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Harvested 4 fish from my main system today. In advance of moving some small but rapidly growing jade perch from my smaller undercover system.

Two silver perch will go in the smoker very shortly..

Two Murray cod to be filleted and eaten for dinner tomorrow. Don't know if anyone else has tried it but I saw something on another forum about making fish leather... thought I'd give it a go.

The biggest of the two Murray cod was about 38 cm and just over 700 grams. Lovely looking fish. The 4 remaining MC have gone into the sump tank. They'll be sharing the tank with some eel tailed catfish who should be big enough to avoid getting eaten :dontknow: Check out the size of the MC mouths in the picture compared to the silver perch.

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