[WallaceGrover]

For my 29g South American clearwater stream biotope, which of these substrates should I use to cap my dirt?

How many pounds do I need?

http://www.substratesource.com/index.php?p=browse_prices

 

[kuni]

Clearwater generally means sand over mud - I'd go with river sand.

You can usually get decent sand at your local landscape supply, or pool filter sand from a pool supply store. Home Depot also has some decent natural looking sands. You want something with a relatively large grain size if possible, but it's not too critical.

The "natural tan" on that site is a decent pick....but you can probably spend $5 at a local place instead of 20-30 dollars online if you look around a bit.

 

[tuffgong]

Something tan and natural looking. Maybe get them to mix all the different tans they have in equal portions.

 

[WallaceGrover]

I ended up getting the natural tan. The sands here are freaking crazy, $50 for 30 pounds....

 

[deleted_user_12]

are you kidding dogs