I have been growing a spag tray that's now very mature and I have a varied depth of 4 to 6"... which I hope to grow a display of varied traps in. I know that everyone likes deep pot's however I have many that are doing well at both of these depths. Now media should be changed every 2-4 years, does this apply to Spag as it's alive and rejuvenates everything as it grows and die's. One other question is that should I still drain the tray of water and just keep damp as per normal in media terms.
Your advise please..
Many thanks Noddy