I have about 40 cacti and succulents in pots on my patio. I've only had one bug problem which was some kind of bug eating my pincushion cactus on the inside. I didn't even know anything was wrong with it until I went to repot. Is there something I can put on my plants to prevent this from happening again? I heard a teaspoon of amonia will help....any other thoughts?

gnu

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The journey is more important than the ending or the start.