BN has stopped eating the algea

[phillippa42]

I got a female BN catfish at the beginning of May - the first few weeks she was eating algea really well, but has now stopped. I'm having to clean the tank sides again now.

I was giving her 1/2 algea flake every evening, so I dropped this to every other evening. Sometimes I have even only put 1/2 flake in every 3rd day. I thought maybe she was too full to eat the algea. But it made no difference.

She seems healthy and happy and I often see her swimming about in the evening.

Any ideas what's going on?

How often should she have algea flakes?

thanks

 

[pseud]

She may be eating algae elsewhere in the tank that you can't see