HELP! I dropped cement in my pond.

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HELP! I dropped cement in my pond.

Post by Kamikaz » Thu, 30 Mar 2000 04:00:00



Help!

I have an about 400 gallon pond.
I managed to drop about 1/4 cup of wet cement (plastic
cement) into it. I am draining the pond as I am writing
this, but I can only take about 2/3 of the water out.
(No bottom drain.) I am also going to get my fish
and turtle out, but I first have to find a place to
put them.

a) Will this kill my animals
b) Is there anything to neutralize whatever is in the
   cement?
c) Will just diluting this enough help?

Dang...inexperience is a terrible thing sometimes.


I am pretty desperate.

Valerie

 
 
 

HELP! I dropped cement in my pond.

Post by Mike » Thu, 30 Mar 2000 04:00:00


Valerie,

    You should be able to get your pond back to normal with no ill effects.
Remove as much of the concrete as you can with a shop vac or siphon. That
plus the 2/3 water change should be sufficient. I'd be more worried about
the chlorine in the water you are adding than the concrete.

Mike G.
www.ponds2go.com


Quote:
> Help!

> I have an about 400 gallon pond.
> I managed to drop about 1/4 cup of wet cement (plastic
> cement) into it. I am draining the pond as I am writing
> this, but I can only take about 2/3 of the water out.
> (No bottom drain.) I am also going to get my fish
> and turtle out, but I first have to find a place to
> put them.

> a) Will this kill my animals
> b) Is there anything to neutralize whatever is in the
>    cement?
> c) Will just diluting this enough help?

> Dang...inexperience is a terrible thing sometimes.


> I am pretty desperate.

> Valerie

 
 
 

HELP! I dropped cement in my pond.

Post by Rod Farl » Fri, 31 Mar 2000 04:00:00


Quote:
>I managed to drop about 1/4 cup of wet cement (plastic
>cement) into it.
>a) Will this kill my animals

No, it shouldn't.  No effect should be noticable.

Plastic cement contains MEK (methyl ethyl ketone), cyclohexanone,
and THF (tetrahydrofuran) solvents, which are respiratory and skin
irritants.  They evaporate as it cures, so the cured plastic cement is
safe.  (Plastic cement does not release any lime into the water, unlike
regular cement.)
Meanwhile, aerate the water as much as possible.  These solvents will
evaporate, rather than stay in the water.  According to the MSDS's
below, they shouldn't bother your fish, and a water change wouldn't
even be necessary.

MSDS for MEK (methyl ethyl ketone):
"When released into water, this material may evaporate to a moderate
extent. When released into water, this material is expected to have a
half-life between 10 and 30 days. This material is not expected to
significantly bioaccumulate...
"This material is not expected to be toxic to aquatic life. The
LC50/96-hour values for fish are over 100 mg/l."
http://www.jtbaker.com/msds/m4628.htm

MSDS for cyclohexanone:
"When released into water, this material may evaporate to a moderate
extent. When released into water, this material may biodegrade to a
moderate extent. This material has an estimated bioconcentration factor
(BCF) of less than 100. This material is not expected to significantly
bioaccumulate....
"The LC50/96-hour values for fish are over 100 mg/l."
http://www.jtbaker.com/msds/c7051.htm

MSDS for THF (tetrahydrofuran):
"When released into water, this material may biodegrade to a moderate
extent. This material is not expected to significantly bioaccumulate.
"96-hour LC50,fathead minnows: 2160 mg/L."
http://www.jtbaker.com/msds/t1222.htm

100 mg/l is a lot, 0.1% by weight.  You have less than 1/100th this
amount.  Aeration should remove it within days, even without a water
change.

Quote:
>I am draining the pond as I am writing
>this, but I can only take about 2/3 of the water out.
>(No bottom drain.) I am also going to get my fish
>and turtle out, but I first have to find a place to
>put them.

Salt is often suggested to alleviate stress from a water change.
3 pounds of salt in 400 gallons would be 0.1% salinity.

Quote:
>I am pretty desperate.

This probably stressed you more than it did your fish.
So save some of that salt for a margarita!
- Rod
 
 
 

HELP! I dropped cement in my pond.

Post by Stev » Tue, 04 Apr 2000 04:00:00


b)--cement is basically lime and sand.  lime as in limestone, which is
used to neutralize acid.  you can add some acid to the pond but not
while the turtle & fish are in it.  relocate them until the pH is back
to normal (you can test this by putting 1 fish in the pond--if it is
okay after a few days it should be safe).
 
 
 

HELP! I dropped cement in my pond.

Post by phil » Wed, 05 Apr 2000 04:00:00


Test it first by doing a ph test not by risking a fish
If you need any more help
please feel free to visit my website
http://www.koiwatch.co.uk

Quote:
> b)--cement is basically lime and sand.  lime as in limestone, which is
> used to neutralize acid.  you can add some acid to the pond but not
> while the turtle & fish are in it.  relocate them until the pH is back
> to normal (you can test this by putting 1 fish in the pond--if it is
> okay after a few days it should be safe).