Renard said:
You have the memory of a goldfish!
Actually, you'd be surprised, if you get them into a routine, they do remember it and know when it's roughly the right time of day for something.
They are also a bit like dogs (and no doubt cats) in the sense that if they want food, they will swim at the top of the tank and look at you as if to say
'Haven't YOU forgotten something??'
No, seriously, they do ...well, mine do anyway.
Either that or they will all stack up on top of each other and watch what you are doing. For example, they will watch you watch the telly, or watch as you eat eat some fish (I don't know if they have made the connection yet) for your dinner, and so on.
Either I have genius Goldfish or they are just supremely bored and need a bit of entertainment in the form of watching me.