I used... because i need lots of age water for my fries and fishes, it comes in different sizes which depends on the individual user and by using it, it save space, cost and looks neat with it... imagine u have 4-5 pails lying around ur house and the cost of buying additional pails...
As for where to get it, u can check with the shop aquarium around ur house some of them do sell it, some of them even go to the extend to keep a look out for u if any hobbyist whom they know intending to sell it off and thats provided u ask them...
Hope this helps...
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