This is my first post here, Fantastic forum by the way,I have been a lurker for sometime and have learnt a hell of a lot. I am geeting a new tank for Christmas, Thanks to my darling wife she might look in The new tank will be 8x2x2.Having looked how much eco complete I will need goind to be in excess of 300 lb so that is at least 15 bags . I have a Rio 400 at the moment that has Eco as the substrate topped off with black sand,The EC has been in there around a year.Will there still be any nutrients in the substrate or will it be basically inert by now ? I would like to add it to the new tank and help keep the costs down but will it be of any benefit to the plants now.Is there any way to remineralise it so to speak if it has lost most of the good stuff in it(sorry for not being very technical) I really like the look of the EC but dont want to have to shell out for another 15 bags. What I dont want to do is find out 3 months down the line that I should have changed it all as the plants are not doing well as that will just be a load of hassle.