I posted this weight thing in another thread somewhere, it has been totally useful to me. the 'proper' weight for rockwool what moist is about 30 or 35g. any heavier than that i just soaked and will cause rot...UNLESS you are in a dwc with an air pump and stones. if the water is highly oxygenated the rockwool can technically sit right in it.
toxinn Reviewed by toxinn on . what do you put the plants in when you use hydroponics? I know people either use those rocky things or those spongy things, or both, but i can't remember the names of them. Rating: 5