Oto's do very well with Betta, and, I actually managed to put some Glass catfish in with one of my Betta. Word of advice? Take the Betta OUT of the tank, re arrange one or two things, THEN add the friends, and lastly, the Betta. When you have the Betta in there first, they think its THEIR tank, and no one elses. And they don't like to share. I did this when I added the Glass cats and it worked like a charm.
Congrats on your first Betta!
AHHHHH we might lose Blue he got stuck to the filter how idk how long i looked over and he was stuck there trying to move but its a strong filter so he couldnt get offi cut the filter off and got him off but now he is just laying on the bottom. he is moving his fins but not swimming. im going to but a sponge over it soon as i get one today.
I hope your Betta has recovered and is back to roaming the tank.
One way I've found works for introducing new fish (I've never had to do this with Otos though, that always went smoothly) is to buy a small breeder tank that you can float in your regular tank. Just those little clear plastic tanks that you can put babies in. Remove whatever dividers and stuff is inside and get a small ornament of some sort where the new fish can hide behind from the rest of the tank inhabitants, because they may be scared when they see the Betta come. Put your new fish in that tank. Your Betta will obsess over them for a while, usually like a week, and once he's used to them, you can introduce them to each other in the main tank (supervised!).
***Disclaimer*** introducing new fish to your Betta can be risky and the success depends a lot of the type of fish you introduce, and the temperment of your Betta. That said, I have successfully introduced a female Betta into my tank using this method, and they even eat together without incident.
Also, make sure you have a lot of (preferably tall) plants (real or fake, but not plastic with sharp edges) or other decorations that blocks your Betta's view and doesn't allow him to be able to see all corners and/or the entire length of the tank.
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