my 2 cents..
i tap on the glass as I pass my tanks....usually to stir up the fish... I know they see me coming and all move towards the glass already....my tapping is in my way saying HOLA!!!
I have not noticed any stressed behavior.. they jump back and then move forward again.. my babies... just me saying HI!!!
some of the don't even move any more...so.. over time they do get used to it... ESPECIALLY my OSCARS!!!
and I do it because I have kids...they DO NOT UNDERSTAND ... "DO NOT TAP ON THE GLASS!!!!!"""" so I condition the fish instead!!
i tap on the glass as I pass my tanks....usually to stir up the fish... I know they see me coming and all move towards the glass already....my tapping is in my way saying HOLA!!!
I have not noticed any stressed behavior.. they jump back and then move forward again.. my babies... just me saying HI!!!
some of the don't even move any more...so.. over time they do get used to it... ESPECIALLY my OSCARS!!!
and I do it because I have kids...they DO NOT UNDERSTAND ... "DO NOT TAP ON THE GLASS!!!!!"""" so I condition the fish instead!!