ChristyLynn wrote:
Thank you for the input. I have just completed a water change and cleaned
off all the red/brown "algae". Considering the fact that this tank was
established over 3 years ago, and the same fish have lived healthily in it,
I"m not sure I want to make any changes. I think I've been doing something
right thus far.

I understand, that is a good point. But consider that many problems are
cumulative and build over time, kind of like smoking in humans; we may
not see any problems in our 20s, but we may in our 50s or 60s.

Carl