Last night before bed I threw a light on the tank in the dark and it was like a nymph hatch I used to encounter fishing on the river back in the day. There were thousands of pods throughout the entire tank. The little guys were all over the tank, swimming and moving around on the glass and rocks. I haven't seen to many on the rocks lately since putting the cleanup crew and the couple of fish in so I was wondering if they all got ate and was considering buying a few hundred to introduce. I guess not though. It was pretty cool and I am assuming that the large number of them all of a sudden is a good thing. Means the tank is healthy?