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Hi guys, Im back. just a quick question.
http://www.backyardaquaponics.com/forum/viewtopic.php?f=4&t=30451
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Author:  BNDYBEAR [ Apr 21st, '19, 17:59 ]
Post subject:  Hi guys, Im back. just a quick question.

hi guys

I'm back in action, moved house a few years back and only managed to relocate a single IBC system to the new house and then another 4-5 years to get it set up again. Today I planted out the growbed. I'll add some photos soon and start a proper system thread but I've got a quick question.

I filled my system with tank water from an old household tank which is one of the existing tanks from the house estimated 15 years old.

While the system was filing I did some water tests. And came up with what I believe is pre cycled water results.

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so is it possible that my old tank water already has a cycle biofilter system in it and the water is pre cycled.

Author:  BNDYBEAR [ Apr 21st, '19, 18:01 ]
Post subject:  Re: Hi guys, Im back. just a quick question.

i should add all other tests were normal ph 7.6 ammonia 0 nitrites 0 but nitrates were as above

Author:  Charlie [ Apr 22nd, '19, 07:30 ]
Post subject:  Re: Hi guys, Im back. just a quick question.

Seems so to some degree Bundy. The fact nitrates are present can only be a good thing.

Author:  BNDYBEAR [ Apr 22nd, '19, 10:33 ]
Post subject:  Re: Hi guys, Im back. just a quick question.

ive planted some vegies out in the growbed and will give it a few weeks to settle and test again. ive added seasol and will wait for my tank clarity to come back again.

Author:  dlf_perth [ Apr 22nd, '19, 16:27 ]
Post subject:  Re: Hi guys, Im back. just a quick question.

>> ive planted some vegies out in the growbed and will give it a few weeks to settle and test again

good idea, that will help to make sure.
the plants will be fine on the Seasol during that time.

Author:  Mr Damage [ Apr 24th, '19, 11:46 ]
Post subject:  Re: Hi guys, Im back. just a quick question.

BNDYBEAR wrote:
so is it possible that my old tank water already has a cycle biofilter system in it and the water is pre cycled.

Yep!... It will have a layer of bio-film around the entire inside of the tank.

I have a 190L Olive barrel with a large Silver Perch in it, about 1.5kg. It has been in there for about 12 months, with no bio-filter or gravel grow bed, just a stand alone barrel with an airstone in it. The Amm level is 0.0ppm, I just have to do weekly partial water changes to keep the Nitrate level down. So I would imagine a large rainwater tank that's had water in it for some time will definitely have a certain amount of bio-filtration capacity, surviving off rotting leaves, dead bugs etc.

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