[a4alan]

Sorry for the delay in readings, i`ve had problems getting on the forum (has anyone else?)...

Here are my readings as of 24/6/06

ph=8 on test kit, 8.4 on hanna meter (might need a dose of buffer solution to check calibrate)
ammonia=between 0.15 and 0.2
nitrite=0.2
nitrate=15
kh=9

As stated before i`ve tried acriflavin, salt, proflavin and lastly vircon s..
Since my last post i`ve only lost one more koi with the same problem..

I`m doing regular part water changes every few days..but the ph on tap water is a problem it`s fixed at 8.4 which to me seems high. I`ve got propolis wound treatment thru from nt labs for the wounds, but i dont have anything to sedate to apply, can i use salt to sedate the fish and at what dosage to do this?

As stated i`ve got around 1500 gallons with uv and a kockney koi 10000v multibay filter,
brushes in vortex
jap matt in bays 1 and 2
perlag (which i`ve soaked overnight in salt) in bay 3 with 4 air stones
flocor in bay 4.
Unfortunatly i dont have a bottom drain so i use a blagdon 4000lts/hour pump to supply the filter, which i think is where my problem may be..LACK OF WATER thru filter the pump seems to struggle i think and i`ve got to daily suck out crap from the pond with my pond vac and floating brown algae from the top, ( no skimmer)..

I have ordered which should be here tuesday a 15000 lt/hour pump and a yamitsui in pond pre filter..(to stop having to clean my brushes every 2nd day).
I also have a vortex but i dont know if i can fit it to the gravity return to pond i presume it needs a high flow of water to suck air in ?
I also thought of putting k1 in the 2nd last bay of the filter (with air) to try and up the filter volume (bacteria properties) what do you think....

Thanks for the advice so far and please answear any of the above questions...regards Alan

[brettkoi]

you can treat koi without sedatting them if your careful and quick,dont use salt to sedate your koi this would be very dangerous,use koicalm or similar.you can use propolis now , but from your readings dont add anything else to your pond til nitrite is zero

[extremekoi]

Hi Alan, your pump should be ok as you are turning over half your pond volume an hour.

You really need to phone a local dealer and ask them to do a scrape on the Koi, this will probably reveal your problem.

[a4alan]

I`ve just done a scrape and found nothing at all, i`m still putting one tablet of vircon s in per week.
I currently have about 7 fish with large holes in their sides and my large yellow ogon has half his mouth deformed with a large hole...
Nothing else in pond at the moment other than vircon, i`ve tried propolis in food and on wounds 3 times but the wounds are not healing, and i think it kills smaller fish as i`ve lost 2 overnight after spreading it on each fish..
All my readings are checked daily, the main ones amonia and nitrite are good...anyone want to come and look...what next? thanks :'(

[brettkoi]

hi Alan , where abouts are you? i,m sure someone can help.

[jimmarion]

hi Alan...
it sounds like i hadthe same trouble as you earlier on,have you bought any fish earlier this year when the temp. was cooler. Check out my "story" under Koi disease. This might help solve your case. I know how sole destroying it is Marion

[a4alan]

Four more gone, and my best tacho sanke 17" this morning, no marks no signs it was fine and feeding yesterday i`ll post a pic later if i can bring myself to look at it again...I live in dumfries, south west scotland, about 20mins from carlisle...any one close to hand, thanks..

[a4alan]

Just had a text from my wife (i`m on nightshift), thats my big yellow ogin gone too..the pride of my pond, i`m f...ing gutted now..sorry for the rant :'( :'( :'( :'( :'(

[brettkoi]

this is only a suggestion ,if i was in the same position , i would drain down the whole pond and filter and clean it ,then start again,you have nothing to lose do you? you might spot the problem in draining it or at least get rid of the bulk of bad bacteria that may be causing your problem.you might just save the rest.if your problem carried on after that ,then ,and i hope not you could guess at khv.I and everyone else on the site im sure,wish you the best of luck,we all know what its like to lose precious koi its gutt wrenching

[john sarge]

I agree with brett
It sounds as though you have a very bad bacterial problem, as a last resort I would drain and clean out the whole pond and start from scratch, the stress might finish off any weak koi but if you leave the pond as it is you will probably lose them anyway, you may find the cause of the infection when you empty the pond (a dead fish or frog under a fold in the liner for instance)

Good luck

John