I read last night on my other (ridiculous) fish forum that mirrors are bad for bettas in any quantity, because all they do is stress them out. This was from the self-described "betta expert."
I have read in many places that giving them some mirror exposure(like 5mins once a week or something), is actually good for them, that the flaring can actually be healthful.
I kinda feel bad now that I put a mirror in front of Sassypants the other day for a couple minutes. Goodness knows I don't want to hurt the dear baby!
Can we discuss this? What is the "right" answer? Conflicting information alert!