5 of 5 people found this helpful
Hi email@example.com, What you are describing sounds like mineral salts from a combo of the nutrient solution and water that have come out of solution and deposited on the outside of the TG (most likely due to water evaporation and/or temperature changes). This is a fairly common occurrence. The higher the concentration of minerals in your nutrient solution, the greater the chances for these crystals to form. -- [please mark this post as "Correct Answer" and/or "Helpful" when appropriate] -- Happy Growing! -JoeD towergarden level2concepts tgtech
2 of 2 people found this helpful
I had this problem a lot during the summer when my water was evaporating quickly, so I just reduced the amount of nutrients used, only replacing nutrients every other time that I replaced water.
4 of 4 people found this helpful
Joe provided you a great definition to what you described. Is it normal? Yes, not alarming at all. Is it necessary to clean it off regularly? Yes, it can be cleaned up regularly with a damp cloth with a little vinegar and water .