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 Post subject: Re: BYAP Trials
PostPosted: Jan 6th, '11, 19:28 
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Iv Also Converted 2 Beds to CF

1 Containing Corn, Basil, Lettuce
1 containing Tomatoes, Capsicum and Eggplant, Zuchini and Cucumbers.

will report on progress/downfall

iv had my 65l tomato tub running CF for weeks now and they love it everything is so rootbound also in there, will be interesting to see how much longer they go before they split the tub open. However they are fruiting excellent and good size fruit, bout to ripen up so will see how they are inside :)

i see some good benifits of running a CF bed in your system, obviously there will be plants that dont like it, its up to us to find these plants and the ones that love it, compile a list. you would be able to run a 1000L Fishtank in Chiftpist, 500L Sump 1 bed flood n drain and 3 CF....

however worms wont like CF Beds which will endup with solids build up... so maybe some solids prefilter would be needed.

one of my other Beds that has straberries in it is only 60L as well, shallow as well and they love it it flood and drains every 5-7 mins, i also have rhubarb which did nothing until i moved it too this bed, im gathering rhubarb likes it wet, with oxy still.


have also had thoughts about setting up a bed that is F&D Siphon but only empties the top half before turning off and filling again, this way it will still draw Oxy down too the tops of the roots, it will F&D Faster and again less sump would be needed, would also inject that dose of DO into the water as it flushes. i would have it so it draws the water from the bottom of the GB still so in theory it will turn over the whole bed of water in 2 cycles, worms may also still live in this.

sorry ramble post over tired :P

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 Post subject: Re: BYAP Trials
PostPosted: Jan 6th, '11, 20:11 
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however worms wont like CF Beds which will endup with solids build up... so maybe some solids prefilter would be needed.


It's funny you mention that, m3tal. My experiences with worms would suggest otherwise.

Before I go on, I would like to preface this by saying there are over 650 species of earthworm in Australia alone, let alone the introduced critters, so YMMV!

But - I have had earthworms (extracted from both my composting bin and my garden) living in abundance in my aquarium for over 6 months - completely immersed in under 1ft of water and a couple of inches of gravel under that. The little guys seem to thrive on the fish poo and excess solid food waste that makes its way to the bottom of the tank. I have even found some in the act of coitus! Similarly, I have all my GBs filled with worms - some F&D, some siphon F&D and some constant flood - and they seem to thrive in all of the GB's, regardless of ebb or tide.


And, from what I understand about worms and their respiratory systems, they actually take oxygen through their skin in some kinda gas exchange process. So long as they are getting some oxygen, they will survive.

Now, if your system was abundant with dissolved oxygen, it should still be a suitable ecocosm for your trusty worm - without any further need for F&D tide movement...

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 Post subject: Re: BYAP Trials
PostPosted: Jan 7th, '11, 12:51 
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Ok finally some more pics uploaded......Recap...
System 1 is Auto Siphon (pics on the left)
System 2 is CF (center pics)
System 3 Timer F&D (pics on the right)

These are from December...


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 Post subject: Re: BYAP Trials
PostPosted: Jan 7th, '11, 12:57 
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Now some from Jan....


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 Post subject: Re: BYAP Trials
PostPosted: Jan 7th, '11, 13:01 
The timer system seems to be a hands down winner.... surprisingly the autosiphon systems seems to be performing less than the constant flood....


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 Post subject: BYAP Trials
PostPosted: Jan 7th, '11, 13:03 
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From what I can see auto siphon beds are lagging behind and timed and cf are on par....

Hmmmmmmmmmmmmmmmmm

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 Post subject: Re: BYAP Trials
PostPosted: Jan 7th, '11, 13:08 
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F&D by a nose :thumbleft:

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 Post subject: Re: BYAP Trials
PostPosted: Jan 7th, '11, 13:17 
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This set of photos compares the growth of the plants on the 17th Dec, 24th Dec and 7th Jan over the 3 systems. This gives a good indication that the overall growth of plants appears to be the best in the timer F&D (system3) at this stage. The plant growth in the CF system is not far off.

Water quality and nutrient levels in the systems will be posted soon with graphs when we get enough data...


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 Post subject: Re: BYAP Trials
PostPosted: Jan 7th, '11, 13:22 
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Yeah plants are definitely preferring the timer F&D, silverbeets are similar but chili plants and capsicums are way better in the F&D.

But as Matt will no doubt post up soon, we still have some ammonia and nitrites in the F&D system.

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 Post subject: Re: BYAP Trials
PostPosted: Jan 7th, '11, 13:29 
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Feed in the systems up to 7th Jan has been similar.

In terms of water quality...

Systems 3 is taking the longest to cycle with constant readings of ammonia and nitrite(both up to 1.0) and was cloudy up until the new year break. However, the Silvers seem to not be too worried and have been eating well throughout.

System 2 (CF) has barely shown any readings of ammonia or nitrite (on testing days) and the water has been crystal clear from the start of the trial with the fish always hungry.

System 1 has shown low ammonia readings (0.25) at times but no nitrites.

All 3 systems have nitrate levels of 10 as of the 7th Jan.


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 Post subject: Re: BYAP Trials
PostPosted: Jan 7th, '11, 13:30 
Any thoughts as to why the auto-siphon system seems to be performing less than the timer F&D system???


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 Post subject: Re: BYAP Trials
PostPosted: Jan 7th, '11, 14:25 
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Weird isn't it......

I have absolutely no idea, they get the same sun, and it's had similar feed rates. There was a period at the start where for a week or so we were mucking getting the siphon going. During this time it might often stay constantly flooded over night, then be fiddled with during the day while trying different siphon combination's. Still I don't think this would have adversely affected the system in any major way, certainly should be no worse than the constantly flooded system.

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 Post subject: Re: BYAP Trials
PostPosted: Jan 7th, '11, 14:29 
Any difference in pH between the systems???... or during the cycling??


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 Post subject: Re: BYAP Trials
PostPosted: Jan 7th, '11, 14:37 
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All systems started at 7.2. Christmas eve they were all 7.0, today they are 6.8, 6.4, 6.6.

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 Post subject: Re: BYAP Trials
PostPosted: Jan 7th, '11, 15:10 
Humm.. so the constant flow system would seem to be nitrifying better than the others...

Have to admit... I'm somewhat surprised....

How often are is the siphon system flooded & drained??


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