SAE weirdness

"Bill Stock" wrote in
:

I've got one SAE that's doing the odd quarter rotation while swimming.
Seems to be trying to scrape it's side against the gravel. Another SAE
also seems to be chasing this same fish. I'm hoping it's some sort of
spawning. If so, what can I do to help make/save babies?

That's not spawning, but the fish itches and tried to scrape its sides or
gills. Most common cause for this is low qiality water (too high nitrite or
nitrate level), and second common cause are parasites.

Liisa