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Re: formaldehyde and paraformaldehyde information
Posted: Tue May 18, 2010 7:10 pm
by Duncan
ok
24 hours into this and the fish are fine
we are at 1.5 oz per gallon salt (0.9%)
and formaldehyde 38% 10 ml to 75 gallons approx 25 ppm
three koi one large two small one with ulcer not phased in the slightest post 24 hour
Re: formaldehyde and paraformaldehyde information
Posted: Wed May 19, 2010 9:09 pm
by Duncan
post 48 hours nothing doing as in alls well
dunc
Re: formaldehyde and paraformaldehyde information
Posted: Wed May 19, 2010 9:46 pm
by tomy2ponds
Hi Duncan how long do you plan to run the test for ??
Re: formaldehyde and paraformaldehyde information
Posted: Thu May 20, 2010 6:47 am
by Duncan
well im gonna throw the kitchen sink in next
i need the vat back for next friday but i dont see it gaining any useful data after that
then i'll write it up
Re: formaldehyde and paraformaldehyde information
Posted: Thu May 20, 2010 6:58 pm
by Gazza
Hi Dunc,
Keep up the good work mate and look forward to the kitchen going in

Re: formaldehyde and paraformaldehyde information
Posted: Thu May 20, 2010 8:10 pm
by Duncan
stove , sink, fride , everything is in there now
Re: formaldehyde and paraformaldehyde information
Posted: Thu May 20, 2010 9:08 pm
by tomy2ponds
Re: formaldehyde and paraformaldehyde information
Posted: Thu May 20, 2010 10:30 pm
by Davej
Hi Duncan
Real interesting.
Now using pristine water with a test subject that has been through the mill, so guess some gill impairment?.
Could it still come back to 02 depletion with the salt and 25ppm formaldehyde? OK with low organics, the formaldehyde will stick around much longer so any adverse reaction on the fish between the salt/form will have longer to take effect.
In a high organic situation could there be a more dramatic (shock) effect from introducing the Formaldehyde to the water that already has depleted O2 levels particularly with a test subject that may have impaired gills? Original tests with typical organic load were with a were at 0.6% salt and a healthy fish.
Sorry for the ramblings. Just trying to explore the possibilities. Guess quick solution would be to see where the dissolved oxygen levels drop to with this combo at different organic loads?
Keep at it please Duncan
Davej
Re: formaldehyde and paraformaldehyde information
Posted: Fri May 21, 2010 8:48 am
by Duncan
just pushed them closer to the edge
0.9% salt 30ppm formaldehyde and standard does of malachite just three clear days after a 25ppm formalin
so we will see tonight have not checked them this morning
dunc
Re: formaldehyde and paraformaldehyde information
Posted: Fri May 21, 2010 8:12 pm
by Duncan
they were great tonight, but oooooh i've gone and done it now!!!!!!
maybe gone to far
get back to ya
Re: formaldehyde and paraformaldehyde information
Posted: Fri May 21, 2010 8:38 pm
by Gazza
Thats it keep me hanging here in suspenders

Re: formaldehyde and paraformaldehyde information
Posted: Fri May 21, 2010 9:14 pm
by tomy2ponds
Thats it keep me hanging here in suspenders
That is a visual thought I could have done without Gaza

Re: formaldehyde and paraformaldehyde information
Posted: Sun May 23, 2010 9:04 am
by Duncan
fish are alive and well and for the most part not even phased, and i will give you the jist of whats gone on over the weekend later tonight , but basically i have crammed 2 weeks of testing into 3 days my heart was in my mouth that i had maybe over done it especially last night on the last dose , but it turned out so far to be a non event
L8R
dunc
Re: formaldehyde and paraformaldehyde information
Posted: Mon May 24, 2010 10:15 am
by Duncan
hi
the tank was 150 gallons filtered but no carbon just plastic media temperature 22c
ok heres what happened on the 17th may the fish 3 in total one large two smaller ones , were in 1.5 ounces per gallon salt (0.9%) which is a lot by any standard . but they had been aclimatised to this
on that night i added a double dose of 38% formaldehyde 10ml to 75 imp gallons , no reaction recorded
three days later another 10ml to every 75 gallons formaldehyde was adminstered along with malachite green at the standard dose rate 10 ml 2% to every 176 gallons . again no reaction
next night with no partial another 10ml to every 75 gallons formaldehyde was admin' d but no MG again no reaction
finally the next nigh another double dose of formaledehyde 10 to 75 gallons yet again no reaction
its been 2 days since the last dose went , and the fish will hopefully be moved back to my main stay q system tonight
but the fish look and are swimming fine
so im finding it difficult to expose a situation where salt and formaldehyde would kill a carp there may be one but i suppose the same can be said for any chemical or compound if you try hard enough or maybe one fish dose take exception to it but again like i say thats the same for almost anything including salt on its own
i learned so stuff while doing it also i leaned how to increase the concentration of formaldehyde beyond whats considered possible ( 40%) and an even faster way to make paraformaldehyde
im writting this up right now but for me this experiement is over i can learn no more from this and if i did kill a fish after what iv'e subj3cted these guys to its would not be the salt and formaldehyde it would be my stupidity in pushing it more than any living creature could stand
untill i finish the write up this will have to do but it hink you will agree i have pushed harder than anyone else would have thought possible and taken it to the limits and ALL FISH ARE STILL WITH US
dunc
Re: formaldehyde and paraformaldehyde information
Posted: Mon May 24, 2010 6:48 pm
by Gazza
Hi Dunc,
Many thanks for taking the time and effort to do this as i know how much time and effort these experiments take and its very informative to our hobby and without people like you out there we would never be where we are in the hobby
Well done and keep up the good work
