Can 2 mothers fit in 20L DWC?

White Widdow and Ak-47 strains. All together theres probably 10L of actual water being used in the system. Is this going to allow full growth of each plant or do I need a larger rez?

It should. 4 gal's which is about 15L will support 4 plants in most good setups, you may have problem with them getting their roots intangled or them invading each others space for light. You could always tie them down to the side some to prevent that though.

Ok, i think they should be fine then given those ratios. Thanks! =)