coarse spongerock

Listing 1 - 1 from 1 for coarse spongerock

Hydroponics, Ray Barkalow, 25 Aug 99
... coarse spongerock I often use now. orchidcoop How about irregular small 1/2 inch or so pieces of clay? ahorchid Is coarse spongerock just a coarse perlite? RayBark Yes, spongerock is just coarse ... paphs that have been in the same pot of spongerock and charcoal for 4 years, and they are doing ... to "wick" moisture and nutrients up from the bottom, and coarse enough to allow lots of airflow to the root ...
www.geocities.com/~marylois