I only ever rarely do any substrate vacuuming and my Corie's are just fine.
Hi anfield,Reading up on Sterbai corys and saw that they are sensitive to "dirty substrates" and the substrates need to be kept "scrupulously clean". Is this really true? I have a heavily planted 40B and aside from spot cleaning with a turkey baster, I do not vacuum the gravel (Eco-complete with a small area of carib sea sand).
Also is this true for all corys in general?