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New Koi Pond Building Business

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Re: New Koi Pond Building Business

Post by Admin on Fri Sep 23, 2011 8:14 am

alank wrote:Now I am being a bit more scientific about what goes in and what comes out, I will try different foods to see what effect they have on water quality.

All I have is filter wool pads for `fines` filtration Alan ... the Sand Filter K3 simply could not hack it nor will K1 ..

How could either when the Media was designed to be (A) `Self-Cleaning` via agitation causing perpetual sloughing of old Bio-Film Layers ....

I struggle to maintain clear water whilst feeding 2% BW per day despite the Pro-Bites `minimal` cloudiness /waste claims.... UV`s assist by incapacitating Algae among other microorganisms (IF configured correctly) removing myriad `food chain` species including detritus consuming heretotrophs who prey upon waste products .. providing of course said waste is fluhed regularly from the system ... which it is via your RDF ... Soooooooooooo wish I had one myself Sweetie Very Happy

As mentioned previously ... Jurgen posted his experience re a submersible UV here Arrow

http://www.themtherekoyas.com/viewtopic.php?f=5&t=1006&p=21973


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Re: New Koi Pond Building Business

Post by alank on Fri Sep 23, 2011 9:35 am

They are very expensive and after an hour of searching, not available in the UK.

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Re: New Koi Pond Building Business

Post by Admin on Fri Sep 23, 2011 9:44 am

alank wrote:They are very expensive and after an hour of searching, not available in the UK.

They are Alan affraid

DagSteve bought his from Europe I believe Sweetie ......

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Re: New Koi Pond Building Business

Post by DaveB on Fri Sep 23, 2011 5:53 pm

Admin wrote:
alank wrote:The RDF is flushed with pond water taken from the clean side of the drum. The contents of the bucket were flushed from the dirty side over 19 hours yesterday. The water is not that clear, or not as clear as I would like it as I cannot get all the fines to sink. Have a look in this clip.

I wouldn`t call the visible debris in the clip fines Alan ... the pieces look too big to me ...

I wonder are the currents keeping the fines in suspension?

Are you still feeding 2% bw per day at 14C ? if so it might be worth cutting back gradually now Sweetie ... in particular if pellets are not being eaten?

Cloudy water can be symptomatic of heretotrophic bacterial blooms due to particulate floating around in the water ..
Not sure what your set up ia Alan and hopefully not stating the obvoius, but getting cuurents just right was paramount in my situation, too much air on my bottom drain( spidrifter ) and within days the water becomes cloudy, too little and I get settling out on the pond floor. With having only one bottom drain at the deep end I have a bottom return from filters which helps to push the debre to the BD. Getting surface currents( for skimmers) and low currents for keeping pond floor clean can be a fine balance in getting it just right. However,more anoyingly some people don't even have to try.

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Re: New Koi Pond Building Business

Post by Admin on Fri Sep 23, 2011 6:10 pm

I had the same problem in my QT Dave ...

Air could only be diffused from the RBD or debris would collect around any other `Air` source (stone) etc placed in the system...and a persistent film of brown dust coated the sides following feeding.

Returns were all splashed back in over the surface.

I have not yet been able to `tweak` the Koi Vat `Air` diffuser on their RBD because Air lifts it off the bottom Rolling Eyes

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Re: New Koi Pond Building Business

Post by DaveB on Fri Sep 23, 2011 6:30 pm

Mio

I also have the heater on the low return which is more efficient than returning at the surface or via a venturi, as I beleive most of the heat is lost a the surface especially when windy. best REgards Dave

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Re: New Koi Pond Building Business

Post by alank on Fri Sep 23, 2011 6:37 pm

The only time I have had crystal clear water was when using a high pressure pump and a glass filter. The system was handling 14000 l/h into the Nexus/glass filter and 15000 l/h into another K1 moving filter which returns to the bottom of the pond opposite the returns from the gf, no debris in the bottom of the pond. The only time I get anything in he bottom of the pond is when I switch off the 15000 K1 filter off.

The problem is getting the fines into the filter as it just goes round and round, there is always a percentage which seems to hang in the water, maybe its all fresh poo from the koi. The bacteria is acting on this and clouding the water.

Today, I am not going to feed just to see if the bloom will dissipate. I have also tweaked the current to see what effect that has.

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Re: New Koi Pond Building Business

Post by Admin on Fri Sep 23, 2011 6:44 pm

DaveB wrote:Mio

I also have the heater on the low return which is more efficient than returning at the surface or via a venturi, as I beleive most of the heat is lost a the surface especially when windy. best REgards Dave

I need the warm water in the filter media though Dave ... which I cannot return under water Sweetie.

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Re: New Koi Pond Building Business

Post by Admin on Fri Sep 23, 2011 8:13 pm

alank wrote:The only time I have had crystal clear water was when using a high pressure pump and a glass filter. The system was handling 14000 l/h into the Nexus/glass filter and 15000 l/h into another K1 moving filter which returns to the bottom of the pond opposite the returns from the gf, no debris in the bottom of the pond. The only time I get anything in he bottom of the pond is when I switch off the 15000 K1 filter off.

The problem is getting the fines into the filter as it just goes round and round, there is always a percentage which seems to hang in the water, maybe its all fresh poo from the koi. The bacteria is acting on this and clouding the water.

Today, I am not going to feed just to see if the bloom will dissipate. I have also tweaked the current to see what effect that has.

The Aerobic species of Heretotrophs in particular replicate more abundantly at low PH 7 -ish etc (being their preference)...

Blooms might therefore actually worsen as the PH declines usually nocturnally Alan.

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Re: New Koi Pond Building Business

Post by alank on Fri Sep 23, 2011 8:24 pm

PH has been fairly consistent at 7.2 to 7.3 for a few weeks now.

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Re: New Koi Pond Building Business

Post by Admin on Fri Sep 23, 2011 8:56 pm

alank wrote:PH has been fairly consistent at 7.2 to 7.3 for a few weeks now.

That would compound the problem Alan and would impact D.0.were the detritus left in the system which fortunately very little is since you incorporated your RDF Very Happy

Tweaking currents/phlows/feeding regimes etc as Dave recommended should resolve these few remaining minor issues. Very Happy

I personally would not pump 55,000 lph through the KC30 .... just my two penneth Sweetie

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Re: New Koi Pond Building Business

Post by DaveB on Fri Sep 23, 2011 10:21 pm

Mio

As always I find the subject o fdifferent types of bacteria very interesting especially if they are influenced by water parametes and which ones out compete for surface area in different conditions. I would be gratefull for any links which would explain the science behind this.

best Regards dave

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Re: New Koi Pond Building Business

Post by Admin on Fri Sep 23, 2011 10:44 pm

DaveB wrote:Mio

As always I find the subject o fdifferent types of bacteria very interesting especially if they are influenced by water parametes and which ones out compete for surface area in different conditions. I would be gratefull for any links which would explain the science behind this.

best Regards dave

Bacteria in particular those that concern us Heretotrophs/Autotrophs/Lithotrophs such as Nitrosomoas Marina/Nitrospira etc proliferate exponentially at high temps but have specific PH limitations ....

Nitrifiers lean toward higher performance in a slightly Alkaline PH whereas Aerobic decomposing Heretotrophs prefer neutral to acid PH..

Interestingly .. and tad Off Topic Costia Nacatrix/Icthyobodo Necator during culturing multiplied more rapidly at PH 4.5 than any other Shocked

The Morale being ... don`t PH Crash your systems Guys more especially if the Babes have Asymptomatic Costia Laughing

http://www.tropicalfishkeeping.com/freshwater-articles/bacteria-freshwater-aquarium-74891/

http://meetrajesh.com/publications/chem_bod_water.pdf


Last edited by Admin on Sat Sep 24, 2011 3:51 am; edited 1 time in total

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Re: New Koi Pond Building Business

Post by Admin on Sat Sep 24, 2011 1:44 am

I`ve moved the last two posts over to `Anoxic Philtration` Guys so as not to further Hijack Alan`s thread Very Happy

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Re: New Koi Pond Building Business

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