I have recently run out of the algae wafers that I feed my 2 plecs. I was wondering if the flakes I feed the others which also end up on the bottom are suitable for them. I also use these little red dots which sink. will my plecs be ok until I can afford more wafers? I am worried that they might not get what they need from flakes although the flakes do say that they are a complete diet for all tropical fish.