50GPD RO/DI Portable System Sufficient?

[ckemph]

I have a 24 gallon Nano Cube tank on order. Would the following RO/DI system be sufficient?

Has anyone used this company before? Reputable?

http://www.purewaterclub.com/catalog/product_info.php?cPath=95&products_id=246

Thank you in advance for any help that you can provide!..