cheers, food grade tubs are easily picked up but take time, i understand the 2" hole is for aeration, allowing the passive hydro to exist, i will make several to be safe
@sk8er.13 i wont be sealing the aeration holes only the original drainage holes.
my question is about sealants, i understand that chemical reactions can take place especially when using an epoxy or super glue as these use chemicals which are not suited for the environment at hand. many people who have homemade hydro setups have used Aquarium grade silicone, clear looking stuff but it is difficult to find info on how fulvic/humic acids at diluted levels affects silicone sealants. i feel confident that it should be safe, especially at such low levels,i am looking for clarification