If you buy fresh flowers from a florist they will often come stuck in a green block of something that resembles styrofoam. I have heard that this is used to hold the flowers in position but also to store water and make it more available to the stems of the flowers. Would this have any use in aquatic environments? Yes, I know, we don't need anything to store water for the plants 
but I am wondering if it would be an effective media to store fertilizers or allow plants to root without eventually compacting and preventing water to flow around the roots.
Do aquatic plants need water to circulate around the roots? Is that advantageous?
but I am wondering if it would be an effective media to store fertilizers or allow plants to root without eventually compacting and preventing water to flow around the roots.Do aquatic plants need water to circulate around the roots? Is that advantageous?
