The idea for plecos really is you put it in after dusk and take it out the next morning after they've had a good feed on it.
I do that twice a week with cucumber and the rest of the week he has a mixture of algee wafers and he also eats the cichlids food and will even make a guest appearance now and then to feed on the frozen prawns (thawed in water) I feed the oscars.
If I cant find my screwcumber (google them if you never heard of them, great things) or just stick a husehold fok or spooninto it.
I do that twice a week with cucumber and the rest of the week he has a mixture of algee wafers and he also eats the cichlids food and will even make a guest appearance now and then to feed on the frozen prawns (thawed in water) I feed the oscars.
If I cant find my screwcumber (google them if you never heard of them, great things) or just stick a husehold fok or spooninto it.