Crushed green walnuts are good for fishing. They deplete oxygen from the water, & the fish comes floating up. I like the entertwined various rooting system for 2 reasons. #1.) For 5 cents of molasses, fish emulsion & liquid seaweed, a buffet, there is no more competition, & #2.) All rooting systems have a GOOD living organiziums attached which builds up the plants immunity system. As it stand at present, 80% of pot growers allow root bind before placing in larger areas, especially during sprouting. This a great harm."Confinement = Males". Just an obversation.