Can humidity be too high?

[ARCH3R]

I see a lot of what you're trying to say. There are very few forms of bacteria in those symbiotic categories. In aquariums the use of cyanobacteria, most commonly algae, are true mutualistic symbiotes with the coral due to their nitrogen fixation. This is part of what balances an aquarium so well, but the process is arguably more complex on land.You're confusing symbiosis with benefit, but in many cases it's harmful, especially to the host of the parasites.

A pH imbalance is only something that you'll notice if you're plants are sensitive to it. Furthermore pH is not the only reason that most people change out soil. Low potassium, nitrogen, or phosphorous should be affecting it. If not growth or color than perhaps bloom. Think of water, although resources are cycled you'll eventually need more to be added.

I browsed the Carl Gans book just now, although it seems very informative I'm not sure how it is pertinent to the discussion. I was saying how little was known about the reptile immune system, ad this book doesn't cover it.