Can anyone please tell me how to lower potting soil PPM. I have mosly Fox Farm ocean forrest but to top off the 4" pots I used some Basement and now my PPM is 1600. The clones are very small, maybe 4" tall. I just potted them from clones yesterday and just got around to testing the soil.
High!!
Looking for knowledgeable CF and CFM experience(s). I have an Osburg 630 cfm 8" sucking through Hepa filter into an 8' x 7' footprint, 6' tall room. So about 336 cf. The basement room is air tight and air blows out all under house through an 8" vent opening and smell and heat is...