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 Post subject: Dr Bees First IBC System
PostPosted: Aug 9th, '11, 09:31 
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Hello AP world,

Have recently started an IBC system near bunbury. Was shifting to a new house so had to keep the system small to start, as I didn't want to shift too much weight around on trailers, and a doubting other half.

Cut an IBC 3 and 2, Top section at 90 degrees to bottom. Made a simple bell siphon, and running small fountain pump from the B shop. Has been running well until rain increased water level to height of outlet, and siphon wouldn't stop sucking. Have diverted some water to spray back into sump, and siphon now stops again. FT appox 500L

Have filled grow bed (200L) with blue metal, and put in plants. Just started with easy plants, lettuce, brocs, Toms, cucumber and starwberries. Had first crop of chinese cabbage last week. Had a tank full of green for a while , but then almost over night, went clear. Guess it has started cycling. Just feeding with Seasol and wee twice per week.

Now looking to put fingerlings in the tank, but no trout left, and SP's not yet ready. Don't really want to heat tank to keep barra.

How many SP fingerlings would be appropriate for this sized system.

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PostPosted: Aug 9th, '11, 15:27 
Welcome Dr Bee.... 10-12 fish max... and with the view to adding another grow bed as they get bigger...


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PostPosted: Aug 9th, '11, 16:09 
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Hello Dr Bee.

I had a similar issue with my siphons when the rain increased the water level in my sump. To resolve it I attached a T piece to the pipe as it exits the bottom of the grow bed allowing it to draw air from there to break the siphon.

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PostPosted: Aug 10th, '11, 11:53 
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Thanks Arbe,

Have had no siphon problems up to now. Kept it simple, with 25mm pipe through the top (now bottom) of the tank lid, with about 4" down pipe underneath. I found I needed just a little bit of down pipe to maintain siphon else stopped when bed half empty to an elbow. Drew a good suction, and broke at the end no probs.

Had trouble visualising what you suggested so jumped on Affnans site and saw one of his setups wiith tee on end of horizontal. Will give it a shot tonight.

Dave

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PostPosted: Aug 10th, '11, 17:28 
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Maybe try fitting an overflow just below the outlet for the siphon, this will prevent the siphon failing and also prevent escapees if the tank itself overflows (assuming you have fish in it).


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PostPosted: Aug 10th, '11, 19:19 
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If you are referring to this then it is close to what I was trying to describe (just a better version)

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PostPosted: Aug 11th, '11, 08:50 
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Arbe,

Yep thats the one. I have just gone for a straight tee and it seems to work. Might need breather and other mods it it goes too far under water, but keeping it simple for time being. Prefer the kiss theory. Fewer moving parts the better.

Will experiment with increased depth in FT and GB. I have kept the grow bed to about 20cm deep, as the volume change in the FT is significant, but will raise bed depth after current lot of seeds sprout.

Dave

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PostPosted: Aug 11th, '11, 09:54 
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A straight T is all I have. As long as it is above the water level it will work.

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PostPosted: Aug 11th, '11, 12:29 
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Hi
how long did it take your water to clear? mine's in the green murky stage now.
did you add fresh wee or aged?

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PostPosted: Aug 11th, '11, 12:48 
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Green murky stage. Sounds like algae has formed. Best thing to do is cover the fish tank and stop feeding fish (or if you have any, or stop adding ammonia if you dont).

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PostPosted: Aug 11th, '11, 12:51 
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+ lots of air!

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PostPosted: Aug 11th, '11, 12:58 
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I've been fishless cycling for 2 weeks. It's more brown than green, a lot of it is just silt from the gravel

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PostPosted: Aug 11th, '11, 13:04 
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edit: just measured ammonia is 0.5ppm
didn't bother testing nitrite/rate

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PostPosted: Aug 11th, '11, 13:58 
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Never tested my water, was cloady from the blue metal, then cleared. Went green after about a month. Was running pump 15min every hour 12 hours per day. After going green, changed to run continuously for 12 hours per day. It took about 3 weeks but was during winter. Was just feeding plants with cap full of seasol at that stage twice per week. I only had seeds in the bed, and they took slowly. Then, blam, over a weekend clear, rapid growth rates from then. Have three 400ml bottles of wee maturing, dosing with two per week. Water smells like in fresh flowing creek, and clear as alpine spring. Seeds sprouted over winter in less than a week and florishing, even with the move from rental to new house (forgot to hook up water and cabbage went to seed). No fish yet.

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PostPosted: Aug 16th, '11, 14:01 
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Ooops, may have upset the levels a bit over weekend. Bit green in tank. Thought I'd water it down a bit. Over filled the tank too much (note to self, don't leave tap unattended if filling) then emptied too much (note to self don't leave siphon unattended if draining tank), now rain filled too much. Tried Afnans modified for high water levels, but can't seem to break auto siphon. Need to play with fill rate a bit more, or maybe just lift GB a bit higher off the FT.

Will continue with Seasol onto foliage but back off on wee(aged about 1 week).

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