How Fragile is Your System?

My kids had a somewhat sad, but I think important, lesson taught to them this week. We have been involved in a process since March with our main fish tank in our house; we have a 65 gallon tank that has a colony of convict cichlids (Archocentrus Nigrofasciatus). In March, a large clutch of babies was spawned, and we’ve been actively working to raise them. The tank is well maintained, it has a lot