So I went and checked on my girls this morning and they are doing great. I went to check the ph levels and ppm and I noticed little worm like things swimming in the water. What is that? Do I need to change the water in that reservoir? Should I be concerned? I have a total of 10 baby's going and they 1 week 3 days old. I only see it in the one reservoir. Will this come from the rapid plugs?