Grower at the Hippocrates in West Palm sells a vidio that he made. And I am sure a few other people have done this also ....With the ingridients I use, as I have said ....I could make twice the profit by CHANGING two of them.Food grade sea kelp MEAL(Canada) and soiless grox mix with no wetting agent or start up fertalizer...(canadian also).let alone the COST of the purify and filter the water sysytem!