Being new to planted tanks, I'm trying to figure out a good algae crew. Currently, I have 2 siamese algae eaters, but as I've read more, I've found the bad probably outweighs the good with them, so I want to get rid of them. I would love to have otos, but I've read mixed reviews. Some say they're easy and hardy, others say most will die off. What are these fish really like?