I am so excited!!! tomorrow i am getting an OTO!!!! YAY!!!

but i have a few questions:
1. can otos be in water that dechlorinated with "betta safe" dechlorinator?? because that is wat i use for Oscar...
2. Does the eat algea wafers??
3. where should i get him/her

petco or petsmart...??
4. Do they need a cave??
5. how can i keep from eating Oscars food?? oscars food floats though so idk if its a problem....?
6. will Oscar try to hurt him/her?? ( Oscar is a crowntail betta)
7. should i worry about the oto trying to nip oscars fins?
8. are their any other problems i should be worried about

?
Thank you - i know this is ALOT of questions but i am trying to know as much as i can about them before tomorrow. Thank you so much, Miley