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RupertofOZ
 Post subject: Re: Ivan's First System
PostPosted: Sep 15th, '09, 23:39 
bunson wrote:
I know what some of the literature says to feed in terms of rates, but I have found it doesn't suit my system. In my FT I have about 2.4kg of fish, but if I feed them 2% i.e. 48grams per day then my ammonia skyrockets and I go into long periods of no-feeding waiting for everything to settle again.

Just until you get the routine for your system, measure your ammonia before feeding; if it's too high then either feed less or wait longer. By this process, I found the times and quantities to feed which work best for my system; at 08:00 they (the fish) get 10grams and at 17:00 they get 15grams (they get more at night because its longer until their next feeding the next morning, giving the ammonia time to be converted). So, per day, they are getting just over 1% and I don't have to scrutinise the ammonia levels as much, unless something else changes.

You should only be feeding your trout 1-1.5% anyway... :wink:
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ivansng
 Post subject: Re: Ivan's First System
PostPosted: Sep 16th, '09, 07:47 
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RupertofOZ wrote:
You should only be feeding your trout 1-1.5% anyway... :wink:


Yes, I was wondering about this. Coz I read somewhere in this forum that you should feed them as much as they will take in x mins. Can't remember the actual minutes. Also read somewhere that excess feeding will only make the fish fatter hence heavier, but the amount of lean meat yield will not be more.

And in reality, if we feed trout accordingly to 1-1.5% of their weight, it would take just seconds for them to finish their feed and they would still behave like they are bloody hungry. Hence the feed them as much as they will take in x mins formula doesn't seem to work.
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bunson
 Post subject: Re: Ivan's First System
PostPosted: Sep 16th, '09, 08:25 
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I had been using literature similar to this (http://srac.tamu.edu/index.cfm?catid=34) as a guide (I know they are for aquaculture, however...) From memory, the highest suggested published feeding rate I have seen applicable to my system is 2.1%, the lowest is 1% which is a pretty wide range; especially when my system is better balanced at the lower extremes of this range.

Ivan, this might help you too for some other general advice; I hope it helps someone anyway :)




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RupertofOZ
 Post subject: Re: Ivan's First System
PostPosted: Sep 16th, '09, 09:22 
The range of feed rate percentage... reflects water temperature and fish size...

Throwing in feed for xx mins might be fine.... but if it's affecting your water quality by raised ammonia and/or uneaten feed.... then don't do it....

Of course excess feed is wasted money as well...
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Nocky
 Post subject: Re: Ivan's First System
PostPosted: Sep 16th, '09, 12:17 
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Troutman and Fish WA suggest 1% especially with higher fat and protein pellets like SK Retting, example I have 50 fish at an avg of about 300gms = 15kg of fish, feed them 150gms of food per day, if I feed them 250gms they would still eat it most days but then I think I would increase ammonia etc, and as they are growing fine it is basically a waste of food and money
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ivansng
 Post subject: Re: Ivan's First System
PostPosted: Sep 17th, '09, 09:39 
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Thanks... I guess I will just stick to about 3 tablespoons for now... my trout are not really big... will weigh them this weekend...
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sustainablehope
 Post subject: Re: Ivan's First System
PostPosted: Sep 18th, '09, 11:31 
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Regards ammonia levels after feeding.

They will peek approx 30min to 1 hour after feeding.

The bottom line with Ammonia being consumed and procedded by the nitro bacteria is almost 5 ml/cc/gms of Oxsygen is required for every 1 ml/cc/mg of Ammonia produced.

Therefore the more you can oxygenate the water and especially in your biofilteration and sub plant roots the more efficient the NH3 will be converted to NH4.

1-2% BW per day for feed is best bet. Always watch your fish when you feed and always only ever feed to satiation. ie when they don't feed anymore after a 5 minute interval etc.
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ivansng
 Post subject: Re: Ivan's First System
PostPosted: Sep 29th, '09, 17:37 
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Just thought that I would post an update...

Fish are feeding, veges look like they are doing well. Have not added additional nutrients except fish food...

Amm - 0 to 0.25
Nitrite - 0
Nitrate - 20

Well looks like the system is coming along good after the initial "issues".

Going to find some yabbies for the yabbie tank soon... currently occupied by some goldfishes and kois.


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creative1
 Post subject: Re: Ivan's First System
PostPosted: Sep 29th, '09, 18:22 
Seriously, this cant be healthy.
Seriously, this cant be healthy.
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I can see a bit of hydroton there.
Might be time to plant some more seeds Ivan :flower:
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ivansng
 Post subject: Re: Ivan's First System
PostPosted: Sep 29th, '09, 18:29 
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creative1 wrote:
I can see a bit of hydroton there.
Might be time to plant some more seeds Ivan :flower:


I believe they should be germinating right now... added seeds after the new moon... waiting for after full moon to put the below ground ones in...
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creative1
 Post subject: Re: Ivan's First System
PostPosted: Sep 29th, '09, 19:10 
Seriously, this cant be healthy.
Seriously, this cant be healthy.
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:flower: that is a good thing then :flower:
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TCLynx
 Post subject: Re: Ivan's First System
PostPosted: Sep 29th, '09, 22:54 
Seriously, this cant be healthy.
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That yabbie tank looks like a perfect place for duckweed too :wink:
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ivansng
 Post subject: Re: Ivan's First System
PostPosted: Sep 29th, '09, 23:44 
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TCLynx wrote:
That yabbie tank looks like a perfect place for duckweed too :wink:


Yes... if you look closely, there are three plant pots with duckweed in them... weather is still too cold for duckweed to grow quickly. I think water temp is mostly still below 15degC. With goldfishes and koi in there at the moment, they would clean up the duckweed pretty quickly if I don't isolated them.

Although it is possible that the water is short of some essential nutrients/trace elements hence duckweed cannot grow properly. Maybe I should put some seasol in this weekend and see... Algae seems to be doing fine making the tank greenish...
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faye
 Post subject: Re: Ivan's First System
PostPosted: Sep 30th, '09, 07:23 
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What are the plants that are in there Ivan, they look like they are very happy?
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Nocky
 Post subject: Re: Ivan's First System
PostPosted: Sep 30th, '09, 10:06 
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Yabbie tank looks good ivan, just a tip move the pots away from edge so they can't use them to climb out, and put some sort of cover over air hoses for same reason
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