<https://www.aquaticplantcentral.com/threads/anyone-keeping-crypts-in-high-light-tanks.4882/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.aquaticplantcentral.com/threads/anyone-keeping-crypts-in-high-light-tanks.4882/#post-468184>