Cryptic Sump - Container Ideas

[vabben]

I’m building out a new system and wanting to include a cryptic sump to hold some old rocks that I’ve had. The rocks are currently in a brute trash can, but am wanting something a little less bulky and square for the ease of plumbing.

The cost of polyethylene water containers are crazy. Does anyone have any cheaper ideas? Maybe a trash liner like below? I’m concerned they may be made cheaply and leach bad stuff?

https://www.globalindustrial.com/p/36-gallon-plastic-liner-black-1

 

[FUNGI]

If you are worried about leaching, get food grade.....

 

[208reef]

I’m building out a new system and wanting to include a cryptic sump to hold some old rocks that I’ve had. The rocks are currently in a brute trash can, but am wanting something a little less bulky and square for the ease of plumbing.

The cost of polyethylene water containers are crazy. Does anyone have any cheaper ideas? Maybe a trash liner like below? I’m concerned they may be made cheaply and leach bad stuff?

https://www.globalindustrial.com/p/36-gallon-plastic-liner-black-1

I might have a few ideas. Do you have any restrictions on the dimensions?

 

[208reef]

Here are a few:

23g Rubbermaid Slim Jim recycle bin:
Amazon product ASIN B001L4PPCW
23g Rubbermaid Slim Jim trash can:
https://www.homedepot.com/p/Rubberm...3-Gal-Gray-Vented-Trash-Can-2001581/301227297
23g Rubbermaid Square trash can:
Amazon product ASIN B079M2BTQ3
I would avoid that one from Global Industrial. It looks super thin and flimsy. The ones above are going to bow a little. With the weight of water, nothing is going to hold shape as well as round since it distributes the pressure evenly against all surfaces.