Have you ever heard that Open Source Programs are no elegant?
This is a very unfear question, because there are hundred of Open Source programs with a high quality design. For example, Simpleinvoices, a invoices management system wirtten in php www.simpleinvoices.org In the same way, Ubuntu Linux is a reference in desktop Operating Systems as design www.ubuntu.com.
A good program not only must work correctly, it should be simple to use. A fundamental aspect to facilitate its use, is the design. An elegant and tidy design helps the user to assimilate and understand better the functioning, and only with an expert user, the programs gives the best results.
LibreAquarium tries to combine both aspects, quality and design into an equilibrium because it is the easiest way of facilitating the work to the user. No complicated menus included, just click buttons.