Originally Posted by tecwzrd
Tupperware’s largest containers that I recall are around 6L or 1.5 gal
so I have no clue how you would use one for a sump. And they aren’t exactly cheap.
Didn't think about the brittle factor, but I think with this quote as well we may not be on the same page as to what type of "Tupperware" I was thinking about. The small Rubbermaid stuff is a fairly soft plastic that I can see getting brittle... but the one's I thought of immediately are much much larger and much less soft to begin with. As I mentioned in my post those giant, nearly bath-tub size Christmas tree tubs were what I was thinking about. The ones of those I’ve run across are more of a hard plastic that doesn’t bend, and less like the soft Rubbermaid types.
And as far as cost...Acrylic and glass fish tanks cost expands when they get bigger. So a small 10g is probably 10-15$, a 20g is probably 40 or 50, with a 55g tank, even from Wal-Mart costing 100+.
In contrast, after Halloween last year, I got a set of 4 15g Sterilite "totes" for 2$ each...
Rubber maid sells a 54g tote, so they do get quite large as well.
I still don't know if it's an idea worth looking into, but those two ideas aren't really a problem.