Ugh, sorry to hear about the otos. They are finicky fish. That cambomba is simply amazing. It is really filling in nicely. The plants are bending due to the high light. It is natural in some species. I have found rotala rotundfolia (probably spelling this wrong) really loves to bend like that. I am stunned that you are able to grow your plants so well without more algae to tell you the truth. I couldn't do it and I am jealous. Are you going to put in more otos? I am subscribing to this, so I don't lose track of your pretty tank.