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Thread: moving bed bio - how much K1 ?
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02-06-2020, 04:54 PM #1
moving bed bio - how much K1 ?
i am building an MBB filter, roughly 220 gallons. anyone ant idea how much K1 i should have in it ?
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Stuffyrat Thanked / Liked this Post
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02-06-2020, 06:03 PM #2
Hi,
the big question is how many Koi and what size?
A 220 gallon/1000 litre container for K1 is good but will take a lot of K1 to fill.
You can buy K1 in 50L bag.
i would buy 2 bags add it and see how it looks and then buy more as required.
Alex
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RS2OOO Thanked / Liked this Post
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02-06-2020, 06:09 PM #3
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bicolormoth Thanked / Liked this Post
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02-06-2020, 06:19 PM #4
5000g pond , only 5 Koi at the moment, maybe will add some later or next year. Filtration: Drum filter + Nexus 210 ; Sieve/shower,
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03-06-2020, 06:52 AM #5
A good ratio to begin with is 50/50 K1 to water.
As said above, start with 2 bags = 100 litres, but you will eventually have scope for something approaching 5 x that.
It matures very slowly so give it plenty of time before adding more. Basically respond to the demands of your water tests once it is mature and your fish stock grows.
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bicolormoth Thanked / Liked this Post
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03-06-2020, 10:56 AM #6
thanks RipleyRich that does sound like a good starting point. I will be using my existing mature K1 from the Nexus i am removing so that gets it all started
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03-06-2020, 07:54 PM #7
It's of absolutely no consequence to me, but perhaps this might be of interest to you, bicolormoth (unless you're in the USA):
https://www.koiforum.uk/koi-pond-equ...tml#post334529
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bigcarpchaser Thanked / Liked this Post
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05-06-2020, 09:25 PM #8
And so the MBB build begins. was gutted to find a crack in the sump whch i have now fixed with a fibreglass repair kit (Halfords), should have the filter in the shed over weekend and hopefully running in a few days time
5000g, Drum Filter/Gravity, + MBB, Skimmer-Sieve-Shower.
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05-06-2020, 09:52 PM #9
I think you could get about 500-550 litres of K1 in there BUT it’s going to take a huge amount of air to move that in such a big volume. I think you would need at least 250litre/min of air.
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05-06-2020, 09:57 PM #10
I had 300l turning over in a 600l IBC on a 70l air pump via 2 diffusers and I had to bleed some air off as it was too much.
You only need a gentle roll not a full on boil.
Sent from my iPhone using Tapatalk
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markini5 Thanked / Liked this Post
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05-06-2020, 10:07 PM #11
Worth a conversation with S&C Koi as they mentioned to me they have noticed a big difference in the performance of their moving beds with higher air (based on the same volume of media). Apparently more air has given them greater fish capacity and improved parameters!
Last edited by DiabloDave; 05-06-2020 at 11:27 PM.
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05-06-2020, 10:48 PM #12
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05-06-2020, 11:23 PM #13
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bicolormoth Thanked / Liked this Post
Running heater at low temp?
Covering the pond with polycarb should be enough to stop water temps dipping below 6C for the most...