View Full Version : setting up a new tank question

04/06/2011, 05:24 PM
i have seen where people have layed eggcrate in bottom of tank then a mesh over the eggcrate and finally sand on top of mesh what is the prpose of this and what r pros and cons of it i understand eggcrate i guess so rocks arent touching glass possibly but not the mesh?

04/07/2011, 05:40 AM
anyone ever seen this

04/07/2011, 06:08 AM
Hmm... Possibly an attempt to create a plenum. Not worth your time. They were big 20 years ago until the deep sand beds were vindicated from stories of fears of hydrogen sulfide accumulation.