Found a decent place for Poly water tanks (Calgary)

[Funky_Fish14]

Another place I've found that is great and has an awesome variety of sizes (though not in Calgary) is Polyrama Plastics in Edmonton. They are on 149st. and about 122avenue I think? Between 120ave and yellowhead. East side of the road. They have a 'showcase room' and have a great variety of stuff and will even put in a bulkhead for you for pretty decent prices.

Cheers,

Chris