I would have to say then that you have experienced a rare exception. I don't know about different types of betta's with shrimp, but I do know betta's and shrimp in general don't mix as they will make lunch meat of them. Lost quite a few RCS myself before splitting them up.Why no cherries with betta? Every betta I have had since I started keeping RCS has been fine with the shirmp. Do different types of bettas have different tempers? I had a delta (he died last month) crown tail and a half moon betta. All live or lived with RCS no problem
Not sure how I missed this one.... Otos aren't that bad. They will take to veggies pretty quickly. The wafers though...those can get a bit tricky.I wouldn't recommend otos personally. They are very picky with food and primarily just stick with the algae that grows off the tank, which there probably won't be very much of in your 10 gallon. Otos are sociable and "require" a few of their kind, but they also are fish that eat constantly, which would mean that the average amount of algae your tank could possible produce probably wouldn't be enough for multiple otos. Chances are that the otos that you will be getting are wild caught, meaning that they will not eat supplemental foods like veggies or algae wafers. If you managed to get otos that were bred and were thus trained to eat such things from the beginning, then all is well.
I would suggest a small school pygmy/habrosus corys. I would suggest kuhli loaches as well because they are very effective at cleaning and produce very little waste, but I've a feeling that their minimum tank requirement is at least a 20 gallon. They aren't very active or so and hide during the day so it may not be a huge problem to house them in a 10 gallon. Think of them as the quiet janitors of the night, never notice they're there except the product of their marvelous work.
Only thing you have to be cautious with having slightly acidic water is shell erosion. I don't know how easily nerites take prepared foods but look into Kens veggie sticks with calcium or making your own snail jello. I use both and my snails shells are in tip top shape.Would Nerite Snails do allright in PH of 6.6?
If not, any other snails that would?