Wafers and tablets. I also give them a bit of sushi from time to time... I'm worried I may put too much food in that will rot!
Any suggestions on amount and alternative food stuff?
Thanks Tokis.
Hmm, wafers and tablets are an important aspect of plecos diet but the are not that great on their own as they lack certain vitamins and minerals that fresh foods like fruit and veg have.
My advice would be to start feeding the plecos cucumber once or twice a week in addition to their usual dried food diet, simply get a fresh cucumber, rinse it under the tapm slice it down the middle (this is the best for larger plecos) or into two large chunks, then stick something through it like a non-rust spoon or some metal aquarium plant weights to weigh the cucumber down in the tank.
The cucumber will be absolutely fine in the tank, although its advised that you take it out after 24hrs to prevent it going nasty, the plecos won't really eat the skin however they'll love the flesh

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I also feed large tomatoes (with seeds removed) in the same manner to my plecos too occasionally.
Some people also feed half-cooked/par boiled potatoes to their plecos too, apparently its really good for them and they love it although i have yet to try it myself.
Prawns, squid, mussels, cockels etc are all good high protein foods, just make sure they haven't had any nasty preservatives on them- only feed such foods about once a week maximum though (depending on the quantity you feed the fish), as plecos like commons and sailfins do not need much high protein foods in their diet to benefet from them

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