I did not read through the whole thread so not sure if this was mentioned....In order to prevent growth in your nutes delivery bottles be sure they are in a dark place ...if you do not have a dark place to mount them I would suggest using Duck Tape or black electrical tape to tape up around your bottles. I know some of you put marks on your bottles to easy measure each fert so all you have to do is be sure that you leave your marks uncovered by the tape....it will keep enough light out of your nute solution and inables you to still see your markings...just a thought
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