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post #1 of 22 (permalink) Old 05-09-2008, 09:05 PM Thread Starter
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Easy cooling?

I was wondering if anyone has attempted this or any thoughts...

Where I live it usually doesn't get very hot. In Fall, there are a couple of days or even a week or two when the lack of air condition really hurts and tank temperatures climb a bit higher than I would like for my fish.

I was thinking of building a box for my canister filter(s), and insulate it with styrofoam, leaving some space around the canister body on all four sides.

Then, when it gets hot, put some of those rectangular freezer cool packs around the filter. They don't take up that much space in the freezer so they could be ready when needed.

With the styrofoam, most of the cool-ness should be transferred to the tank water.

Maybe a bit more elegant than floating them in the tank?


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post #2 of 22 (permalink) Old 05-09-2008, 11:38 PM
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seems like it would work but could this make it heat up when theres not ice packs in it?


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post #3 of 22 (permalink) Old 05-09-2008, 11:44 PM Thread Starter
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I don't believe so. If you put the insulation around the canister body only, it will not change the temperature. The pump motor is what creates the heat, and that one is on top (and should probably not be covered/insulated).

I wonder if the cold packs could affect and stress the plastic canister housing.


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post #4 of 22 (permalink) Old 05-09-2008, 11:52 PM
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maybe put a thin towle around the filter like when you get a goose egg on your head haha


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post #5 of 22 (permalink) Old 05-10-2008, 12:02 AM Thread Starter
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Thanks for adding ideas.


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post #6 of 22 (permalink) Old 05-10-2008, 12:17 AM
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I don't believe that frozen ice packs, which are coated in plastic, would cause the plastic of the canister to reach a temperature where brittleness would occur. Maybe if you had some liquid nitrogen around the filter it would be an issue


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post #7 of 22 (permalink) Old 05-10-2008, 12:27 AM
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Quote:
Originally Posted by eyebeatbadgers View Post
I don't believe that frozen ice packs, which are coated in plastic, would cause the plastic of the canister to reach a temperature where brittleness would occur. Maybe if you had some liquid nitrogen around the filter it would be an issue
It probably depends on what filter you have.
I wouldn't discount anything happening to those cheap Chinese filters.They can break under even the most ideal conditions,and they are brittle fresh out of the box.


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post #8 of 22 (permalink) Old 05-10-2008, 12:31 AM
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Quote:
Originally Posted by lescarpentier View Post
It probably depends on what filter you have.
I wouldn't discount anything happening to those cheap Chinese filters.They can break under even the most ideal conditions,and they are brittle fresh out of the box.
I believe that brittleness is usually associated with the latches that secure the top of the canister, and the hose connection area, and not the actual "body" of the canister itself correct?

Cooling smooth plastic that doesn't move or flex to 30*F shouldn't cause issues, but I'm not a scientist. I do have a friend who is though


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post #9 of 22 (permalink) Old 05-10-2008, 01:14 AM
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Originally Posted by eyebeatbadgers View Post
I believe that brittleness is usually associated with the latches that secure the top of the canister, and the hose connection area, and not the actual "body" of the canister itself correct?
Well,it stands to reason that if the parts that you indicate are brittle,then the rest of the filter is brittle too.Like I said,I would use caution with these cheap filters.

I like the cooling idea though.It should work great.


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post #10 of 22 (permalink) Old 05-10-2008, 03:24 AM Thread Starter
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Got four of the $2 Blue Ice weekender packs. Got plenty of wood and tools. Got canister filter. Now I just need time.

Filstars are sturdy so I am not overly concerned. But yes, cooling the outside to say 10F (those ice packs do get colder than 32F) while the inside remains at 80F has got to introduce some tension. That's what I am concerned about, not plastic getting brittle.


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post #11 of 22 (permalink) Old 05-11-2008, 10:59 AM
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hey guys why cant we just get a sturdy plastic case or something to put the ice pack into and let it float in the water and then take it out around 30 minutes or so?
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post #12 of 22 (permalink) Old 05-11-2008, 12:58 PM
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It sounds like a good idea but you are going to need a freezer full of ice packs. They will not last long against the temps of the filter housing which would be the same temp as the water you are trying to cool.
The heat from the motor wont effect the tank temps like you say but the heat from lighting and ambient room temp will be a bit much to overcome Im sure. The fast contact to and small volume of water in the filter housing wont change a large tank before going through a dozen ice packs.

Now if you could also insulate/cool the intake and output hoses as well it may stand a chance.
It might work on a small tank but anything 75G and bigger I dont think would much effect.

Only one way to find out though eh?
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post #13 of 22 (permalink) Old 06-19-2008, 10:37 PM Thread Starter
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I haven't build the "Canister cool box", laziness and more rewarding projects win.

However, floating the ice packs is just as efficient. Just for some data, two of the weekender packs reduce the temperature in my 100gal tank by 0.75F (that's 3/4 of a degree). I have four of them in the freezer, using all of them reduces the temperature roughly by about 1.5 degrees.

Of course that will differ from tank to tank, depending on ambient temperatures, heat added by light and filters, etc.

Not sophisticated, but simple.


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post #14 of 22 (permalink) Old 06-19-2008, 10:58 PM
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Get a bucket, fill it up with some water, put icepacks in bucket, and put the canister into the bucket?

Do you think having the insulating foam around the canister will work better than just having the canister in a bucket of iced water?

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post #15 of 22 (permalink) Old 06-20-2008, 12:01 PM
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FWIW, you can make your own ice packs folks.

Fill a ziplock bag 2/3 full of water and fill the other 1/3 with alcohol. Put this bag in anothe bag and put in the freezer. Voila, instant ice pack. And they are reusable of course.


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