Hi! I purchased a sanseveria at our local Walmart recently. When I got it home, I noticed that it had rotten leaves and stunk rather badly. So I repotted it and made 3 new pots out of one. When I did so, I noticed really bright green little balls (tons) in the old soil..I thought it was some kind of fertilizer and didn't think anything more about it. Then, after repotting, I noticed that those same little green balls were all in the crown areas of plants, took some out to look closer and they squished like a regular pill bug would..goo came out so it was then that I figured that they were actually some kind of pests and not fertilizer. Could these have been causing the rotten leaves and large brown spots on the leaves? What should I spray with to get rid of these? Thanks ahead.