20L in my opinion. I know high tech doesn't always mean high light, but if I understand it correctly, you'd get higher par for cheaper than if you went with the 29, if that was your intention. What kind of fish would you be looking into? I think that would also influence my decision. They are both fine tanks. Think about the plants, fish, hard scape that you want and go from there. That's just my opinion. Browsing all the tank journals really helped me to decide on the look I wanted. For me it was finding out what plants I want first.. then hardscape ideas. Acceptable fish for my tank will come much later.
Last edited by KribsDirect; 01-10-2014 at 06:53 PM.