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#1
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![]() Always tape heat packs to the inside of the lid. Of course this only works if shippers pay attention to up arrows but none the less good practice. Also many suppliers place a few granules of carbon in each bag for good measure.
Last edited by sphelps; 01-24-2013 at 01:49 AM. |
#2
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![]() I recieved my corals today and the water was quite cold as well. Packaging was impeccible but I think maybe one or two heat packs inside the black bag which wrapped the clear plastic ones along with a couple on the lid may help a bit.
Corals seem to be okay though so that is good! |
#3
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![]() Martin & I received our order today as well. I was not there when it arrived but from what I seen packages was great & I thought the little thank you note on the inside of the lid was priceless.
Now the heat pack debate...... IMO & this is both mine & martins opinion, the heat packs should be place right under the bags holing the frags. If its on the lid it's heating nothing but the lid. That's all I have to say on that. WHAT I REALLY LIKED......is the customer service especially from Spencer & Dan. Had a slight issue when Martin & I ordered one of the same frags, Spencer emailed & problem solved. Tonight I received an email from Dan asking how the order was. GREAT CUSTOMER SERVICE hands down.
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Feed the bear goodies, make a new friend, don't feed the bear............... 8' - 165gal Reef DIY LED's Build 2012 Nano Contest Winner Febuary 2013 POTM Winner 300 gal + 60 gal Complete DIY Build |
#4
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![]() Quote:
And Greg is right communication with the guys at Blue World was very good Last edited by jorjef; 01-24-2013 at 03:35 AM. |
#5
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![]() If the heat pack where tossed into a bag & put right under the coral it would help greatly. I had an Oder from fragalot that I instructed him to pack this way when it was -30 here last yr and the temp in the bags with the frags was actually pretty good.
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Feed the bear goodies, make a new friend, don't feed the bear............... 8' - 165gal Reef DIY LED's Build 2012 Nano Contest Winner Febuary 2013 POTM Winner 300 gal + 60 gal Complete DIY Build |
#6
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![]() Thanks for the comments everyone!
We're going to run a series of experiments over the next couple days with our boxes and heat packs, but our main concern is actually over heating the boxes. The temperature at the origin of the package (in our case, relatively warm Victoria) will play a big part in the temperature fluctuations inside the packaging. I haven't had a lot of experience shipping livestock...but I have been on the receiving end of hundreds of livestock shipments. Sometimes they are shockingly cold...and often turn out fantastically. Recently I had a shipment of fish that arrived nice and warm (with more heat packs than usual), close to tank temp, and experienced especially high DOAs. My suspicion is that heat packs can cause a shipment to peak at dangerously high temperatures without careful consideration. We want to provide the highest possible quality of livestock and care, and we will continue to refine our methods until we achieve perfection. Of course all feedback is helpful and appreciated!
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![]() ![]() ![]() www.BlueWorldAquariums.com Portfolio builds: XBOX 360 Pico Reef | Don's 185 Deep Reef | Microsoft Game Studios Victoria's 225G Reef | Belmiro's Restaurant 125g Reef -Spencer |
#7
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![]() Definitely have to say this was the best packed shipment of corals I have ever received. They were bagged 5 times and the carbon pellets were a good touch too to soak up any nasties that accumulate during shipping. All corals doing well!!
However I have noticed this trend lately of taping the heat pack to the lid and I have been wondering why. Heat rises! Heat is transferred in one of 4 ways: Radiation - Needs to be infra red heat (which a heat pack is not) Conduction - Air (and packing peanuts) are very poor conductors of heat. Convection - A convection current cannot start inside the box because heat rises and the heat source is at the top. Advection - Doesn't happen because nothing inside the box is moving. If you want the best use of a heat pack with also protecting the corals place the heat packs in the center of the bottom of the box, put some packing peanuts on top of them or some Styrofoam less than size of the footprint of the box. The corals can then go on top of that. That way they are not touching the heat pack and the heat back is free to create a convection current inside the box. The warm air will rise up over the corals and cool air sink to the heat packs. Thus the corals stay warmer. If the heat pack never gets hotter than the water temperature then the corals can go right on top of them. Then you get convection and conduction! ![]() That thermal conductivity class did come in handy after all haha. Lord Kelvin would be proud haha we went to the same university although he died 92 years before I got there. ![]()
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Western Database - Custom database, software design and cloud hosting. |
#8
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![]() In reality it makes no difference where the heat pack goes as your main concern is the heat loss through conduction through the insulated box resulting from a temperature differential. There should be little to no air in a properly packed box and it should also be air tight. The heat loss will be the same regardless whether it's placed on the bottom, side or top. If you're attempting to make free convection flow patterns in your shipping boxes then you're doing it wrong. The temperature in the box and the bags of corals should and will eventually be the same during shipping. Heat packs do get hotter than safe temperatures for livestock so direct contact of the packs and bags containing livestock is not recommended. BWA is correct, the bigger issue with shipping is actually too hot, not too cold.
They are placed at the top simply because it's the least likely place to get wet. 9 times out of ten the bottom of shipping boxes arrive wet or flooded. No other reason, it's just common sense. On a side and completely unrelated note, three types of heat transfer exist, advection is just a form or convection (forced convection). Radiant heat transfer occurs in all objects provided there is temperature difference, so a heat pack certainly does transfer heat through radiation. |