It seems to me that you would need 4 tanks to test this out. Since Penac is said to raise CEC value because it is primarily bentonite (I "think" I understand this to be true...), you would have to test it against a substrate that also has a high CEC value (the fired clays such as Flourite or SMS). You would also have to test it against a strerile substrate (like pea gravel).
So, anyone have 4 tanks they want to experiment with? Fired clay alone, fired clay + Penac, pea gravel alone, and pea gravel + Penac...same plants, lighting, ferts, etc...
Dang! I would totally love to run this test, but don't have the tanks! If anyone volunteers, I'll donate plants.
-Dave
So, anyone have 4 tanks they want to experiment with? Fired clay alone, fired clay + Penac, pea gravel alone, and pea gravel + Penac...same plants, lighting, ferts, etc...
Dang! I would totally love to run this test, but don't have the tanks! If anyone volunteers, I'll donate plants.
-Dave