Geos dropping like flies

[BMac91]

As an update, I still have the two remainingRed Heads that seem to be acting fine. A little aggression has spiked up now that the numbers have reduced, however. The larger male will chase the other RH around, not terribly bad, but more than I have seen in the past.
No split fins or apparent stress for the smaller guy, so just seeing how things go.

 

[jamntoast]

There are a ton of things to consider but one thing I haven't seen mentioned in this thread is air supply. I have had 6 out of 8 red heads die over night when the air pump broke and I have heard similar stories from other hobbiests. I was fine with a power head making waves and I moved it and next morning everything was on the bottom. Do you have an air stone or anything?

 

[neutrino]

There are a ton of things to consider but one thing I haven't seen mentioned in this thread is air supply. I have had 6 out of 8 red heads die over night when the air pump broke and I have heard similar stories from other hobbiests. I was fine with a power head making waves and I moved it and next morning everything was on the bottom. Do you have an air stone or anything?

True. Good catch. Meant to mention it but it slipped my mind.

 

[duanes]

This is a very good point, in my Geophsgine tanks, I also use venturi valves on all influents, so there is generally a lot of current, and break up of surface tension.
And a few years back when a influent valve was pluugged a number of Geo's came close to death with 24 hours.